Acrosup64.dll Is Not Marked For Installation Site

The error message "Error 2753: The File 'acrosup64.dll' is not marked for installation" typically occurs when installing or updating Adobe Acrobat Adobe Reader

• Type sfc /scannow and press Enter.

Here is the technical cascade:

• Corrupt Windows Installer service – Run sfc /scannow and DISM /Online /Cleanup-Image /RestoreHealth in an admin command prompt.
• Disk errors – Run chkdsk /f /r on your system drive.
• User profile corruption – Create a new Windows user account and attempt the installation there.

Reinstall: Download a fresh offline installer from the Adobe Enterprise page rather than the standard web installer.  📂 Manual Cleanup (If the Tool Fails)  acrosup64.dll is not marked for installation

Navigate to C:\Program Files (x86)\Adobe (or C:\Program Files\Adobe) and delete any remaining folders. The error message "Error 2753: The File 'acrosup64

John had no idea what this error meant or how to fix it. He tried restarting his computer, but the error persisted. He then attempted to reinstall Adobe Photoshop, thinking that maybe the installation had gotten corrupted, but that didn't work either. Type sfc /scannow and press Enter

Step 3: Use System File Checker (SFC)

1. Open Command Prompt as Administrator (as described above).
2. Run SFC Scan:

   The Root Cause: A Versioning War

   This is rarely a "virus" or a "corrupt OS." It is a version mismatch and ACL (Access Control List) conflict.