The error message typically halts Adobe Acrobat or Reader installations. It usually points to a conflict during a software update or patch deployment. Understanding why this happens and how to resolve it ensures a smooth installation process. What Causes This Error?
Open Run again, type msiexec /regserver and press (this reregisters the service).
In extreme cases, a (keeping your files) or a clean OS reinstall may be necessary—though very rare for this specific error.
You didn't ask to mark anything. You just wanted to install a program. So, what is going on?
"acrosup64.dll is not marked for installation" (often accompanied by Error 2753 acrosup64.dll is not marked for installation
For enterprise environments, a more strategic approach involving base versions, full MSI packages, and automated cleanup deployments is recommended.
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
If the above methods fail, use a specialized utility to clean the Windows Installer database.
Aggressive security software can lock acrosup64.dll during extraction, triggering the installation failure. What Windows operating system version are you running? The error message typically halts Adobe Acrobat or
If this fails, it is actually a good sign, as it means the file is already detached. Run the installation package again. Solution 4: Extract and Use the MSI Installer
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.
Understanding the Acrosup64.dll Installation Error The error message typically occurs during the installation, patching, or updating of Adobe software, most notably Adobe Acrobat or Adobe Reader. This specific error indicates a corruption or a conflict within the Windows Installer (MSI) database, where a required 64-bit support library cannot be properly registered or deployed on the system.
⚠️ WARNING: Back up your registry by clicking File > Export before deleting any keys. 4. Extract and Run the Offline MSI Installer What Causes This Error
If the installer cannot overwrite the keys governing acrosup64.dll , manually purging Adobe keys can bypass the error. (Note: Back up your registry before making changes). Press Windows Key + R , type regedit , and hit .
Download the version corresponding to your software (Acrobat or Reader).
Launch the program and select your specific software track (Acrobat or Reader).