Is Not Marked For Installation: Acrosup64.dll

The error "Error 2753: The file 'acrosup64.dll' is not marked for installation" typically occurs when installing or updating Adobe Acrobat or Reader. It usually indicates that leftover registry keys or corrupted files from a previous installation are conflicting with the new one. 🛠️ Direct Fix: Use the Adobe Cleaner Tool

The most effective solution is to completely wipe previous Adobe traces before reinstalling.

Download the Tool: Get the official Adobe Reader and Acrobat Cleaner Tool. Run the Cleanup:

Open the tool and select Acrobat or Reader (run it twice if you had both). Follow the prompts to remove all components.

Restart: You must reboot your computer to clear the registry.

Reinstall: Download a fresh offline installer from the Adobe Enterprise page rather than the standard web installer. 📂 Manual Cleanup (If the Tool Fails)

If the cleaner tool doesn't work, manual removal of hidden folders and registry keys is often necessary. 1. Delete AppData Folders Press Win + R, type %AppData%, and hit Enter. Delete the Adobe folder.

Go up one level and check the Local and LocalLow folders; delete any Adobe folders there as well. 2. Registry Cleanup (Advanced) Press Win + R, type regedit, and hit Enter. Back up your registry first (File > Export).

Navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products\

Look for keys starting with 68AB67CA (this is a common prefix for Adobe products) and delete them if they reference Acrobat or Reader. 🖥️ Alternative: Register the Installer Service

Sometimes the Windows Installer service itself is suspended or glitched. Open the Command Prompt as Administrator. Type msiexec /unreg and press Enter. Type msiexec /regserver and press Enter. Try running the installer again. 📦 For IT Admins (GPO/SCCM)

If you are deploying this across a network and seeing this error:

Extract the MSI: Use 7-Zip or a command line to extract the .exe installer into a folder.

Direct Install: Run the AcroRead.msi directly from the extracted folder rather than using the setup bootstrapper. To help you further, could you tell me: Are you using Adobe Acrobat Pro or the free Reader? Is this a personal computer or a company-managed device? Did this happen during an update or a fresh install? error the file acrosup64.dll is not marked for installation

"acrosup64.dll is not marked for installation" (often appearing with Error 2753

) typically occurs during an Adobe Acrobat or Reader update/installation when leftover files from a previous version conflict with the new installer. Key Findings & Review Root Cause

: It generally signifies that the installer is attempting to place a file that it believes is already present or was incorrectly registered by a prior installation. This often happens after a system crash, an incomplete uninstallation, or when moving files to a new drive (like an SSD). Reliability of Official Fixes

: Most users find that the standard "Add/Remove Programs" uninstaller is insufficient to clear the conflict. Adobe's dedicated cleanup utility is frequently cited as the first necessary step for a successful resolution. User Consensus : Community feedback on the Adobe Support Community suggests that manual deletion of Adobe folders in

and specific registry keys is often required when automated tools fail. Commonly Recommended Solutions

Technical Report: Error 2753 - acrosup64.dll is Not Marked for Installation 1. Executive Summary The error message "The file 'acrosup64.dll' is not marked for installation" (often accompanied by Error 2753

) typically occurs during the installation, uninstallation, or update of Adobe Acrobat or Adobe Reader. It indicates that the Windows Installer service encountered a script reference to a file that it believes should not be part of the current installation action, usually due to leftover files or corrupted registry entries from a previous version. JustAnswer 2. Technical Details File Identified acrosup64.dll (Acrobat 64-bit Installer Support). Common Scenarios

: Upgrading from older versions (e.g., Reader XI) to newer versions (e.g., Acrobat DC) or reinstalling after a system crash. Root Causes Registry Conflicts : Stale entries from failed uninstalls. Leftover Files : Physical files remaining in the C:\Program Files (x86)\Adobe directories that conflict with the new installer. Installer Corruption acrosup64.dll is not marked for installation

: Corrupted Windows Installer service or installation packages. 3. Recommended Solutions

The following steps are ordered from the most common effective fix to more advanced system repairs. Step 1: Use the Adobe Acrobat Cleaner Tool

Adobe provides a specialized utility to remove all traces of previous installations that standard uninstallers might miss. Download the tool from the official Adobe Cleaner page

Run the tool, select the product version (Reader or Acrobat), and complete the cleanup. Restart the computer before attempting a fresh installation. Step 2: Manual Directory Cleanup

If the cleaner tool fails, manually remove remnant folders that might be causing the conflict. Program Files : Delete any Adobe-related folders in C:\Program Files (x86)\Adobe : Navigate to %USERPROFILE%\AppData and delete Adobe folders within the subfolders. Step 3: Re-register the Windows Installer Service

Resetting the installer service can resolve "not marked for installation" errors by refreshing its internal state. Adobe Help Center error the file acrosup64.dll is not marked for installation

How to Fix "acrosup64.dll is not marked for installation" (Error 2753)

If you are trying to install, update, or uninstall Adobe Acrobat or Adobe Reader, you might encounter this error message:

"Error 2753. The file 'acrosup64.dll' is not marked for installation."

This installation error stops the process immediately, leaving your PDF software corrupted or unusable. It typically happens because of orphaned files from previous installations, corrupted setup files, or mismatched registry keys. What Causes Error 2753?

Residual Installation Files: Previous Adobe Acrobat or Reader installations left behind folders and temporary files.

Corrupted Windows Installer Cache: The Windows Installer engine holds cached MSI data that clashes with the new software.

Registry Key Conflicts: Corrupted or outdated registry keys point to DLL files that no longer exist or cannot be overwritten.

Damaged AppData Folders: Temporary or local configuration files prevent the updater from executing properly. 4 Methods to Resolve the Error 1. Use the Official Adobe Acrobat Cleaner Tool

The most effective way to solve this issue is to completely remove all traces of Adobe products from your system before trying a clean installation.

Download the official tool from the Adobe Reader and Acrobat Cleaner Tool.

Run the executable and follow the prompts to remove both Acrobat and Reader. Restart your computer.

Download the full standalone offline installer from the Adobe Acrobat Reader DC Distribution page. Run the new installer. 2. Manually Delete Adobe Folders

Sometimes the uninstaller does not remove all files. Residual folders under your user profile can trigger Error 2753. Press Windows Key + R to open the Run dialog box. Type C:\Program Files (x86) and press Enter.

Locate the Adobe folder. If it exists, right-click and delete it.

Open the Run dialog box again, type %localappdata%, and press Enter. Delete the Adobe folder found inside the Local directory. The error "Error 2753: The file 'acrosup64

Open Run again, type %appdata%, and delete the Adobe folder inside the Roaming directory. Empty your Recycle Bin and restart your PC.

3. Clear Windows Installer Registry Entries via Revo Uninstaller

If the native Windows uninstaller continues to fail with the acrosup64.dll error, use a third-party uninstaller to force-remove the program and wipe leftover registry entries. Download the free version of Revo Uninstaller.

Open Revo Uninstaller and select Adobe Acrobat or Adobe Reader from the list. Click Uninstall.

If it fails with the same error, use the Advanced Scan option inside Revo to scan for leftover registry keys and files.

Select all the detected registry keys, click Delete, and then delete the detected residual files. Restart your computer and perform a fresh installation. 4. Extract and Run the Installation Files Manually

If the standard installation package crashes, you can manually extract the Microsoft Installer (.msi) file using an extraction utility like 7-Zip. Download the offline Adobe executable installer (.exe).

Right-click the .exe file and extract its contents using 7-Zip into a new folder. Open the extracted folder and find the AcroRead.msi file. Right-click AcroRead.msi and select Install.

Once complete, run the update file (.msp) inside the same folder to update the software to the latest build. Summary Troubleshooting Checklist Action Item Why it helps Adobe Cleaner Tool Safely removes corrupt installation profiles. Delete AppData Folders Cleans out bad cached files preventing the update. Third-Party Uninstaller Removes orphaned registry entries. Manual Extraction Bypasses faulty bootstrapper installers.

Did these steps resolve the installation error, or are you deploying Adobe Acrobat via GPO or SCCM across a network? error the file acrosup64.dll is not marked for installation

Here’s a good bug report for the issue “acrosup64.dll is not marked for installation”:

Title:
acrosup64.dll is not marked for installation – component missing during Adobe Acrobat setup

Environment:

Application: Adobe Acrobat Pro / Reader (specify version, e.g., Acrobat Pro 2020, DC Continuous)
OS: Windows 10 / 11 (64-bit)
Installer type: MSI / Setup.exe / Managed deployment

Steps to Reproduce:

Launch Acrobat installer or run a customization transformation (MST).
Attempt to install or repair the application.
Monitor installation log or verbose MSI log.

Observed Result:
The installation log contains the entry:
acrosup64.dll is not marked for installation.
The file acrosup64.dll is missing from the installed directory (e.g., C:\Program Files\Adobe\Acrobat DC\Acrobat\), and certain PDF operations (e.g., accessibility or save-as functions) fail.

Expected Result:
acrosup64.dll should be installed to the product folder as part of the core Acrobat installation.

Impact:

Reduced functionality in Acrobat (e.g., support for certain PDF forms, accessibility features).
Errors when calling Acrobat APIs that depend on this DLL.

Workaround (if found):
Manually copy acrosup64.dll from a working system into the Acrobat folder and register it with regsvr32, but this is not a permanent fix.

Additional Information:

Likely caused by an MST customization where the component containing acrosup64.dll was unintentionally set to 0 install state.
Check the MSI component ID for acrosup64.dll using Orca or similar MSI editor.
Verify if the component’s Condition is false during install.

Suggested Fix (for administrators):

Re-author the MST to ensure the component containing acrosup64.dll has install state = Local.
Set REINSTALLMODE=vomus and reinstall the feature that owns the DLL.

Would you like a PowerShell script to detect if the file is missing, or a template for a bug tracking system (e.g., Jira, Bugzilla)? Title: acrosup64

How to Fix the "acrosup64.dll is not marked for installation" Error

If you are trying to install or update Adobe Acrobat or Reader and hit the error message "File 'acrosup64.dll' is not marked for installation," you aren't alone. This is a common Windows Installer (MSI) glitch that usually pops up when there’s a conflict between an existing installation and a new update.

Here is a straightforward guide to getting your software back up and running. What Causes This Error?

The error typically occurs because the Windows Installer service thinks the acrosup64.dll file (a core component for 64-bit Adobe support) already exists in a state that shouldn't be overwritten, or the registry keys from a previous version are "ghosting" the new install. Step 1: Use the Adobe Acrobat Cleaner Tool

The most effective way to fix this is to completely wipe the slate clean. Standard uninstalls often leave behind the very registry keys causing the conflict.

Download the Adobe Acrobat Cleaner Tool from the official Adobe website. Run the tool and select your product (Acrobat or Reader). Click Cleanup Now.

Restart your computer. This step is vital to clear the system cache. Try a fresh installation of the software. Step 2: Manually Rename the Adobe Folders

If the cleaner tool doesn't work, manual intervention might be needed to "hide" old files from the installer.

Close all Adobe processes via Task Manager (Ctrl+Shift+Esc). Navigate to: C:\Program Files\Adobe

If you see a folder named Acrobat, rename it to Acrobat_Old.

Navigate to: C:\Program Files (x86)\Common Files\Adobe and do the same for any relevant folders. Attempt the installation again.

Step 3: Run the Program Install and Uninstall Troubleshooter

Microsoft provides a specific tool for when programs won't install due to corrupted registry keys.

Download the Microsoft Program Install and Uninstall Troubleshooter. Run it and select Installing.

Look for Acrobat or Reader in the list. If it’s not there, select "Not Listed."

Let the tool repair the registry patches and try your installation once more. Step 4: Check for Windows Updates

Sometimes the Windows Installer service itself is out of date, leading to "not marked for installation" errors across various software. Go to Settings > Update & Security > Windows Update. Click Check for updates. Install any pending updates and restart. Final Pro-Tip: The "Direct Download" Method

If you are getting this error while using the Adobe Creative Cloud desktop app, try downloading the standalone offline installer from the Adobe website instead. These installers are often more "forceful" and can bypass the minor MSI conflicts that trigger the acrosup64.dll error.

Solution 4: Manual Registry Fix (Advanced)

Warning: This step involves editing the Windows Registry. Incorrect edits can cause system instability. Proceed with caution.

If the error persists, the specific registry key for the component might be corrupted. You can attempt to locate the component key, but this is often difficult as the keys are GUIDs (random strings of numbers). A more practical advanced step is to re-register the DLL manually, though this is a workaround rather than a full fix.

Open the Command Prompt as an Administrator (Search CMD, right-click, Run as Admin).
Type the following command (you may need to verify the file path): regsvr32 "C:\Program Files\Adobe\Acrobat\Acrobat\acrosup64.dll" (Note: The path depends on your installation folder).
Hit Enter. If successful, you will see a confirmation message.
Attempt the update again.

3.4. Ensure Full Admin Rights & Safe Environment

Disable antivirus temporarily.
Run installer via right-click → Run as administrator.
Install in Windows Safe Mode with Networking (minimal interference).

Solution 3: Stop the Windows Installer Service

Sometimes, the installer service gets "stuck" thinking an installation is already in progress. Resetting the service can clear the blockage regarding acrosup64.dll.

Press Win + R to open the Run dialog.
Type services.msc and hit Enter.
Scroll down to find Windows Installer.
Right-click it and select Stop.
Wait a moment, then Right-click and select Start.
Try running the Adobe update installer again.

Step 2: Take Ownership (The Real Fix)

You cannot delete the old file normally. You need to take ownership.

Navigate to C:\Windows\System32\ (and C:\Windows\SysWOW64\ if on 64-bit Windows).
Search for acrosup64.dll.
If found, right-click → Properties → Security tab → Advanced.
Next to "Owner," click Change. Type Administrators → Check Names → OK.
Check the box: "Replace owner on subcontainers and objects".
Click Apply → OK.
Now, right-click the file again → Properties → Security → Select your user → Full Control.
Delete the file. (Rename it to acrosup64.old first if you are cautious).