Home

Windows 11 Pro Activation Key Github Work -

A "deep post" on GitHub regarding Windows 11 Pro activation typically refers to community-maintained repositories or "Gists" that provide Generic Volume License Keys (GVLKs) or automation scripts for activation via Key Management Service (KMS). Windows 11 Pro Generic Keys (KMS/GVLK)

These keys are official Microsoft-provided keys used to identify your system version for KMS activation. They do not provide a permanent retail license on their own but are necessary for script-based activation methods. Windows 11 Pro: W269N-WFGWX-YVC9B-4J6C9-T83GX Windows 11 Pro N: MH37W-N47XK-V7XM9-C7227-GCQG9

Windows 11 Pro for Workstations: NRG8B-VKK3Q-CXVCJ-9G2XF-6Q84J GitHub Activation Methods

GitHub repositories like Kachly/Windows-11-activation or Symbolexe/W11ACP often highlight two primary community methods:

Command Prompt (KMS) Method:Users run a sequence of commands to point Windows toward a public KMS emulator server: slmgr /ipk [KEY] — Installs the generic key. slmgr /skms kms8.msguides.com — Connects to a KMS host. slmgr /ato — Triggers the activation.

PowerShell "One-Liner" (MAS):One of the most popular "deep" methods found on GitHub and forums involves a single PowerShell command (irm https://activated.win | iex) which opens an interactive Microsoft Activation Scripts (MAS) menu. This tool can provide Digital License (HWID) activation, which is permanent and survives system reinstalls. Key Considerations Activate Windows - Microsoft Support

Searching for "Windows 11 Pro activation keys" on GitHub typically leads to repositories containing KMS (Key Management Service) scripts generic keys activator tools

. While these are popular in tech communities, using them carries significant security and legal considerations. Types of GitHub "Activation" Content KMS Scripts & Tools : Repositories like massgravel (Microsoft Activation Scripts)

are widely cited. They often use HWID (Hardware ID) or KMS methods to activate Windows without a purchased key. Generic Product Keys : Many README files list "generic" keys (e.g., VK7JG-NPHTM-C97JM-9MPGT-3V66T

). These are provided by Microsoft for installation purposes but

provide a genuine license or permanent activation on their own. Command Line Methods : Some users share

commands to point a local machine toward a third-party KMS server. Medha Cloud Security Vulnerabilities : Downloading and running

scripts from unknown GitHub users is risky. Malicious code can be hidden within these scripts to install malware, steal data, or create backdoors. Legal & Terms of Use : Using these tools violates the Microsoft License Terms

. For businesses, this can lead to compliance issues and legal liability. System Stability

: Unofficial activators can sometimes break Windows Update or cause system instability if they modify core system files. Official & Safe Alternatives Digital Licenses

: If you previously owned Windows 10 Pro, the license often carries over to Windows 11 Pro automatically via your Microsoft Account Microsoft Store

: You can purchase a genuine Pro license directly through the Activation settings in Windows 11. Troubleshooter : If you have a valid key that isn't working, use the Windows Activation Troubleshooter to resolve the error. Microsoft Support

: While GitHub offers "free" solutions, they are technically non-genuine. For a secure and stable PC, especially for professional use, an official digital license is the recommended route. If you'd like, I can help you with:

if your current Windows 10 license is eligible for a free upgrade. Troubleshooting a specific activation error code (e.g., 0x803F7001). legitimate discounted keys through authorized retailers. Get help with Windows activation errors - Microsoft Support

I understand you're looking for a Windows 11 Pro activation key. However, I must clarify that discussing or sharing activation keys, especially on platforms like GitHub or through direct requests, can be associated with software piracy and is against the terms of service of most software companies, including Microsoft.

Microsoft offers various ways to activate Windows 11 Pro legitimately:

  1. Purchase a License Directly from Microsoft: You can buy a Windows 11 Pro license directly from Microsoft's official website. This ensures you get a legitimate key and support from Microsoft.

  2. Retail Purchase: You can also purchase Windows 11 Pro licenses from authorized retailers. This could be in the form of a digital license or a physical copy.

  3. Upgrade from Windows 10: If you're currently using a genuine version of Windows 10, you can upgrade to Windows 11 Pro through the Windows Update mechanism or by purchasing an upgrade from the Microsoft Store.

  4. Volume Licensing: For organizations, Microsoft offers volume licensing. This program allows organizations to purchase multiple licenses for their devices, which can be more cost-effective and easier to manage.

Regarding GitHub, while it's a platform primarily used for sharing and collaborating on code, it's not a place to find or share software activation keys. GitHub's terms of service prohibit the distribution of any kind of pirated software or material that violates intellectual property rights.

If you're looking for a free version of Windows or want to try it out, Microsoft offers Windows 11 Home for free (with some limitations) for those who are looking to try out the operating system. For a full-featured experience with Windows 11 Pro, purchasing a legitimate license is the recommended and legal path.

If you have any more questions or need help with purchasing or understanding Windows 11 licenses, I'd be happy to guide you through the official channels and best practices.

Windows 11 Pro activation keys and free activation scripts are frequently hosted on GitHub Gist, a platform developers use to share code snippets and configurations. These repositories typically provide either KMS (Key Management Service) client keys or automated scripts to activate Windows via Command Prompt (CMD) or PowerShell. Common Windows 11 Pro Keys on GitHub

GitHub contributors often list generic or volume license keys. The following keys are commonly cited for Windows 11 Pro editions: Windows 11 Pro: W269N-WFGWX-YVC9B-4J6C9-T83GX Windows 11 Pro N: MH37W-N47XK-V7XM9-C7227-GCQG9

Windows 11 Pro for Workstations: NRG8B-VKK3Q-CXVCJ-9G2XF-6Q84J Windows 11 Pro Education: 6TP4R-GNPTD-KYYHQ-7B7DP-J447Y Popular Activation Methods

Users on GitHub share several methods for activating Windows 11 Pro without purchasing a traditional retail license:

Command Prompt (KMS Method): This is the most common manual method. It involves pointing your system to a public KMS server using specific Software Licensing Management (slmgr) commands. Example sequence: slmgr /ipk W269N-WFGWX-YVC9B-4J6C9-T83GX (installs the key) slmgr /skms kms8.msguides.com (sets the KMS server) slmgr /ato (triggers activation)

Microsoft Activation Scripts (MAS): A highly-rated open-source project hosted on sites like nirevil.github.io that automates the process using HWID (Hardware ID), Ohook, or Online KMS methods.

PowerShell "One-Liner": Some Gists provide a single command (often using irm and iex) that downloads and executes a script directly in PowerShell for instant activation. Important Considerations

Verification: Always verify the activation status in Settings > System > Activation after running any script.

Security Risks: Running scripts from untrusted GitHub Gists can be risky. Expert communities often recommend checking the source code of any script before executing it with Administrator privileges.

Legality: These keys are typically KMS client keys intended for organizational use; they may not provide a "permanent" retail license for personal use. Windows 11 Activation - GitHub Gist

While there are many resources on GitHub related to Windows 11 Pro activation, it is important to understand the difference between legitimate tools and unauthorized scripts. The most popular method discussed on GitHub involves Microsoft Activation Scripts (MAS), which uses PowerShell to automate activation. 🛠️ Common GitHub Activation Methods

Researchers and enthusiasts on platforms like GitHub often use two primary automated techniques: windows 11 pro activation key github

Digital License (HWID) Activation: This is considered the "permanent" method. It generates a legitimate-looking digital license for your hardware, which stays active even after a Windows reinstall.

KMS38 / Online KMS: These methods use Key Management Services (KMS) to activate Windows for a set period (often 180 days) or until 2038. 📝 Step-by-Step Guide (PowerShell Method)

The most widely used "all-in-one" script hosted on GitHub can be run directly via PowerShell.

Open PowerShell as Administrator: Right-click the Start button and select Terminal (Admin) or PowerShell (Admin).

Run the Command: Users typically copy and paste the following command to launch the MAS interface:irm https://activated.win | iex

Choose Activation Type: A menu will appear in the console. Most users select [1] HWID for permanent activation of Windows 11 Pro.

Wait for Completion: The script will verify your system and apply the license. Once finished, you can check your activation status in Settings > System > Activation. ⚖️ Safety and Legal Considerations

Using these scripts involves certain risks and legal nuances:

[Windows 11/10] Windows Activation, Retrieval, and Modification ... - ASUS

Many users look to GitHub for Windows 11 Pro activation to avoid high retail costs. While you won't usually find a "list" of working product keys—as these are blocked quickly—GitHub hosts powerful scripts that automate the activation process using Microsoft's own licensing frameworks. 🛠 Popular Methods on GitHub

Most GitHub repositories for Windows activation use one of two methods: 1. KMS (Key Management Service)

How it works: Tricks Windows into thinking it’s part of a corporate network.

The Script: It connects to a third-party server to "validate" your license. Result: Renews every 180 days automatically. 2. HWID (Hardware Identification)

How it works: Mimics the digital entitlement process used for free upgrades.

The Script: Generates a permanent "Digital License" linked to your motherboard.

Result: Permanent activation, even after reinstalling Windows. ⚠️ The Risks You Should Know

Using scripts from GitHub isn't without danger. Before running any .bat or .ps1 file, consider these factors:

Security: Malicious actors can disguise malware as activation scripts.

Stability: Improperly coded scripts can corrupt system files.

Legality: These methods bypass Microsoft's Terms of Service. Privacy: Some KMS servers may log your IP address. 💡 How to Stay Safe If you choose to explore GitHub for activation tools:

Check the Stars: Look for repositories with thousands of stars and active contributors.

Read the Code: Since scripts are open-source, verify what the commands are actually doing.

Use MAS: The "Microsoft Activation Scripts" (MAS) repo is currently the most trusted community standard.

🚀 Key Takeaway: GitHub offers functional ways to activate Windows 11 Pro via HWID or KMS scripts, but always prioritize reputable repositories to keep your data safe. If you'd like to write this for a specific audience: Tech-savvy hobbyists (Focus on the CLI/PowerShell commands) Budget builders (Focus on cost savings) Security professionals (Focus on the "why" and risks) Which perspective should we use?

The Ultimate Guide to Windows 11 Pro Activation Key GitHub: Everything You Need to Know

Are you looking for a reliable and affordable way to activate Windows 11 Pro? Look no further than GitHub, a popular platform for developers and tech enthusiasts. In this article, we'll explore the world of Windows 11 Pro activation keys on GitHub, including what they are, how to use them, and the benefits and risks associated with them.

What is a Windows 11 Pro Activation Key?

A Windows 11 Pro activation key is a 25-character code that is required to activate the Windows 11 Pro operating system. Without a valid activation key, you won't be able to access all the features of Windows 11 Pro, and your computer will display a watermark reminding you to activate the operating system.

What is GitHub?

GitHub is a web-based platform for version control and collaboration on software development projects. It allows developers to host and share their code with others, making it a popular platform for open-source projects. GitHub is also a great place to find and share software, including Windows 11 Pro activation keys.

Why Use a GitHub Windows 11 Pro Activation Key?

There are several reasons why you might want to use a GitHub Windows 11 Pro activation key:

How to Find a Windows 11 Pro Activation Key on GitHub

Finding a Windows 11 Pro activation key on GitHub is relatively straightforward. Here are the steps:

  1. Search for "windows 11 pro activation key": Open GitHub and search for the phrase "windows 11 pro activation key" in the search bar.
  2. Browse the results: Browse through the search results, which will include repositories and gists (small code snippets) that contain Windows 11 Pro activation keys.
  3. Choose a reputable source: Look for repositories or gists with a high number of stars, forks, or likes. This can indicate that the activation key is legitimate and working.
  4. Copy the activation key: Once you've found a reputable source, copy the activation key.

How to Activate Windows 11 Pro with a GitHub Activation Key

Activating Windows 11 Pro with a GitHub activation key is a straightforward process:

  1. Open Settings: Open the Settings app on your Windows 11 Pro computer.
  2. Click on Update & Security: Click on the "Update & Security" option.
  3. Click on Activation: Click on the "Activation" option.
  4. Enter the activation key: Enter the Windows 11 Pro activation key you found on GitHub.
  5. Activate Windows: Click on the "Activate" button to activate Windows 11 Pro.

Benefits of Using a GitHub Windows 11 Pro Activation Key

There are several benefits to using a GitHub Windows 11 Pro activation key:

Risks Associated with Using a GitHub Windows 11 Pro Activation Key A "deep post" on GitHub regarding Windows 11

While using a GitHub Windows 11 Pro activation key can be a great way to save money, there are some risks associated with it:

Alternatives to GitHub Windows 11 Pro Activation Keys

If you're not comfortable using a GitHub activation key, there are alternative options:

Conclusion

In conclusion, using a GitHub Windows 11 Pro activation key can be a cost-effective way to activate the operating system. However, it's essential to be aware of the risks associated with it, including the potential for legitimacy and security issues. If you decide to use a GitHub activation key, make sure to choose a reputable source and follow the activation process carefully.

FAQs

Here are some frequently asked questions about Windows 11 Pro activation keys on GitHub:

By following the information and guidelines provided in this article, you can make an informed decision about using a GitHub Windows 11 Pro activation key.

Finding a reliable Windows 11 Pro activation method on GitHub typically points to Microsoft Activation Scripts (MAS)

, a widely used open-source tool that automates the activation process without needing manual "keys" which often expire.

Most Reliable GitHub Method: Microsoft Activation Scripts (MAS)

Instead of searching for a static text key (which are usually generic KMS keys that don't activate by themselves), most users utilize the MAS repository for permanent activation. Permanent Activation (HWID):

This method provides a permanent digital license for Windows 11 Pro that remains even after a system reinstall. Safe & Open Source:

MAS is open-source, allowing the community to verify its code, which reduces the risk of malware compared to "cracked" software. Quick Execution:

Activation typically takes less than three minutes via PowerShell. How to Activate via GitHub (MAS) Open PowerShell: Right-click the button and select Terminal (Admin) PowerShell (Admin) Run the Command: Copy and paste the following command and press irm https://get.activated.win | iex Choose Activation Type: A menu will appear. activation (recommended for a permanent license). Wait for the "Product Activated Successfully" message. Common Windows 11 Pro Generic Keys GitHub Gists often list Generic KMS Client Keys

. These are not "free licenses" but are used to tell Windows which edition to activate when connecting to an activation server. Community thoughts on Windows activation scripts?

I understand you're looking for a Windows 11 Pro activation key via GitHub, but I need to be clear: providing, sharing, or promoting unauthorized activation keys, key generators, or bypass tools (including those often found on GitHub) violates Microsoft's terms of service and may constitute software piracy.

Instead, here’s a short, informative story about why relying on GitHub for Windows keys is risky—and the right way to activate Windows.

Title: The Cost of a “Free” Key

Aarav had just built his first gaming PC. He installed Windows 11 Pro, but the “Activate Windows” watermark sat stubbornly in the corner of his screen. On a tight budget, he searched for a quick fix.

He found a GitHub repository promising “Windows 11 Pro activation keys” with thousands of stars. Excited, he ran a PowerShell script from the repo as administrator. The watermark vanished—success!

But two days later, his antivirus flagged unusual outbound connections. His browser redirected to shady ads. A week after that, someone tried to log into his email from another country. The “free key” script had installed a silent keylogger and a cryptominer that used his GPU while he slept.

When Aarav finally wiped his drive and reinstalled Windows cleanly, he bought a legitimate license key from Microsoft’s store for $199. It hurt his wallet, but he learned: a genuine license isn’t just about legality—it’s about security.

GitHub is great for open-source tools, but Windows product keys are proprietary. Any repository claiming to offer free, working keys is either:

Today, Aarav runs an activated, secure copy of Windows 11 Pro—paid for, updated, and malware-free.

Legitimate options for Windows 11 Pro:

  1. Buy directly from Microsoft Store.
  2. Purchase from an authorized retailer.
  3. Check if your employer or school provides a free license through Microsoft’s Volume Licensing or Azure Dev Tools for Teaching.
  4. Use Windows 11 unactivated (limited personalization, but fully functional and safe).

Stay safe. Don’t trade your security for a “free” key.

Users searching for a "Windows 11 Pro activation key GitHub" often find themselves at a crossroads between free, community-driven scripts and official licensing requirements. While GitHub is a repository for open-source code, Microsoft does not host or authorize any GitHub repositories for the purpose of obtaining free activation keys or bypassing licensing. How Activation Works on GitHub

Most "activation" resources found on GitHub aren't actually lists of keys, but rather PowerShell or Batch scripts that automate a background process to validate the OS.

Generic Volume License Keys (GVLK): Some repositories list 25-character keys. These are often generic keys intended for system deployment or testing. They can set the edition (e.g., from Home to Pro) but will not activate the software for permanent use without a valid license server.

Activation Scripts (e.g., MAS): Tools like the Microsoft Activation Scripts (MAS) are popular on GitHub for automating activation methods like HWID (Hardware ID) or KMS (Key Management Service).

HWID Activation: This method tricks Microsoft's servers into granting a permanent digital license to the machine, effectively making it "genuine" in the eyes of Windows Update. The Legality and Safety Risks

Using unauthorized scripts or keys from GitHub is a complex gray area. While GitHub itself is owned by Microsoft and hosts these projects, that does not make their usage legal under Microsoft's licensing terms. Navigating Software Compliance with Activator Challenges

3. Lack of Genuine Support and Features

Even if the activation seems real, it is not a genuine license.

Conclusion: Don’t Do It

To directly answer the search query: No, you should not use a “Windows 11 Pro activation key” from GitHub. The keys either don’t exist, are long-expired, or are part of an activation script that poses a significant security risk to your machine.

While the temptation to save $199 is real, the cost of identity theft, a ransomware attack, or your computer being used as a botnet is infinitely higher.

Your safest options:

Your digital security is not worth a cheap exploit. Activate responsibly.

The Truth About Windows 11 Pro Activation Keys on GitHub Searching for a "Windows 11 Pro activation key" on GitHub often leads to repositories filled with scripts and generic keys. While these resources are popular, it’s important to distinguish between what is a functional tool, what is a security risk, and what is a legal license. 1. Understanding "Keys" vs. "Scripts" on GitHub Purchase a License Directly from Microsoft : You

Most GitHub entries for Windows activation fall into two categories:

Generic Product Keys: Many Gists (like those on GitHub Gist) provide keys that only select the edition of Windows (Pro vs. Home) during installation. They do not activate the software.

Activation Scripts: Tools like Microsoft Activation Scripts (MAS) are open-source scripts that automate the activation process using methods like HWID (Digital License) or KMS. 2. Is Using These Methods Safe?

Safety is a major concern when running third-party scripts with administrator privileges:

Open Source Transparency: Proponents argue that scripts like MAS are safer than "cracked" executable files because the code is transparent and can be reviewed by the community.

Malware Risks: Security experts warn that bad actors often create "trojanized" versions of popular scripts to install malware or backdoors.

Microsoft’s Stance: Microsoft identifies these methods as unauthorized and has actively blocked certain hacks, such as the KMS38 method, through security updates. 3. The Legal and Technical Reality

Activating Windows through unofficial scripts is technically a violation of Microsoft's licensing agreements.

Detection: Microsoft can detect unauthorized activation, which may lead to the system being deactivated or losing access to certain features.

Business Risk: Using these tools in a professional or business environment is highly discouraged due to the legal risks and lack of official support. 4. How to Activate Windows 11 Pro Legally

For those seeking a permanent, risk-free solution, there are several official paths: Upgrade Windows Home to Windows Pro - Microsoft Support

GitHub repositories for Windows 11 Pro activation often focus on automated scripts that bypass traditional licensing or utilize generic Volume License (KMS) keys. While these tools can activate Pro features like BitLocker or Remote Desktop, Microsoft officially warns that using third-party scripts from unofficial sources may compromise device security or void compliance. Common GitHub Activation Methods

GitHub contributors frequently share two main types of resources for activating Windows 11 Pro:

Microsoft Activation Scripts (MAS): This is one of the most popular open-source toolkits. It uses methods like HWID (Digital License) for permanent activation or Online KMS for 180-day cycles.

Command Line Guides (KMS): Many GitHub Gists provide step-by-step commands to activate via a KMS server. These typically involve: Installing a generic product key using slmgr /ipk.

Connecting to a KMS host with slmgr /skms kms8.msguides.com. Executing activation with slmgr /ato. Publicly Shared Generic Product Keys

GitHub repositories like rvrsh3ll's Gist or Kachly's repository list generic keys used for installation and volume activation. Windows Product Keys - GitHub Gist

Searching for a Windows 11 Pro activation key on GitHub typically leads users to the Microsoft Activation Scripts (MAS), an open-source project hosted by the user massgravel. This repository is widely recognized for automating the activation of Windows and Office through various technical methods. Common Activation Methods on GitHub

GitHub contributors often share scripts that leverage Microsoft's own enterprise licensing frameworks to activate consumer devices.

HWID (Hardware ID): This is the most popular method for Windows 10 and 11. It tricks Microsoft’s servers into granting a permanent digital license for the specific hardware, meaning the device remains activated even after a clean reinstall.

KMS (Key Management Service): Originally designed for large organizations to activate many computers at once, scripts use "Online KMS" to connect to third-party servers that validate the license. These activations typically need to renew every 180 days.

Generic Upgrade Keys: Many GitHub Gists list "generic keys" (e.g., VK7JG-NPHTM-C97JM-9MPGT-3V66T). These keys do not "activate" Windows by themselves; they are used to trigger a version change—such as moving from Windows 11 Home to Pro—before a real license or script is applied. Risks and Safety Considerations

While the official MAS GitHub repository is open-source and has been reviewed by the community, there are significant risks associated with third-party activation tools: Windows Product Keys - GitHub Gist

Title: "The Risks and Realities of Using Windows 11 Pro Activation Keys from GitHub"

Introduction

Windows 11 Pro is the latest operating system from Microsoft, offering a range of advanced features and improvements over its predecessors. However, obtaining a legitimate copy of the software can be costly, leading some users to seek out alternative methods of activation. One such method involves searching for Windows 11 Pro activation keys on GitHub, a popular platform for developers and open-source projects. In this article, we'll explore the risks and realities of using Windows 11 Pro activation keys from GitHub.

What are Windows 11 Pro Activation Keys?

A Windows 11 Pro activation key is a 25-character code required to activate a copy of Windows 11 Pro. The key is used to verify that the software has been purchased or obtained through legitimate channels. Without a valid activation key, users may not be able to access all the features of Windows 11 Pro or receive important security updates.

The Appeal of GitHub Activation Keys

GitHub is a well-known platform for developers, with a vast repository of open-source projects and code snippets. Some users may search for Windows 11 Pro activation keys on GitHub, hoping to find a free or low-cost alternative to purchasing a legitimate key. However, it's essential to understand that these keys are often uploaded by users who have obtained them through unauthorized means or have shared their own legitimate keys.

The Risks of Using GitHub Activation Keys

Using a Windows 11 Pro activation key from GitHub can pose significant risks to your computer and personal data. Here are some of the potential risks:

  1. Malware and Viruses: Downloaded keys may be infected with malware or viruses, which can compromise your computer's security and put your personal data at risk.
  2. Invalid or Expired Keys: GitHub activation keys may be invalid, expired, or have already been used by others. This can lead to activation failures, denied access to Windows updates, or even software crashes.
  3. Security Updates and Support: Using an unauthorized activation key may prevent you from receiving critical security updates and support from Microsoft.
  4. Data Loss and Corruption: In some cases, using a pirated activation key can lead to data loss or corruption, especially if the key is used to bypass security measures.

Legitimate Alternatives

Microsoft offers various options for users who want to obtain a legitimate copy of Windows 11 Pro:

  1. Purchase a New License: Buy a new license directly from Microsoft or an authorized retailer.
  2. Upgrade from Windows 10: If you're already running Windows 10, you can upgrade to Windows 11 Pro using the built-in upgrade tool.
  3. Volume Licensing: Businesses and organizations can purchase volume licenses for Windows 11 Pro, which can be more cost-effective for large deployments.

Conclusion

While searching for Windows 11 Pro activation keys on GitHub may seem like an attractive option, the risks and consequences far outweigh any perceived benefits. By choosing a legitimate activation method, you can ensure the security and stability of your computer, as well as receive critical updates and support from Microsoft.

Searching for "Windows 11 Pro activation keys" on GitHub typically reveals three main categories of content: generic setup keys automation scripts informational guides

. While these resources are widely accessible, they vary significantly in function, legality, and safety. Types of Content Found on GitHub Activate Windows 11 for Free via CMD | PDF - Scribd

The Better Path: How to Get Windows 11 Pro Legally and Cheaply

You don’t need to risk malware or piracy to afford Windows 11 Pro. There are several legitimate ways to get it at a fraction of the retail price or even for free.

Summary

The "Windows 11 Pro activation key GitHub" phenomenon represents a shift in software piracy from "cracking" executables to "scripting" legitimate enterprise protocols. While it offers a technical solution for users unwilling or unable to pay for a license