Acrosup64.dll Is Not Marked For Installation

: Ensure there are no lingering keys for older versions (like Acrobat XI) under HKEY_LOCAL_MACHINE\SOFTWARE\Adobe .

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

Click on each key and inspect the string value on the right panel.

Before diving into more complex solutions, perform these essential checks: acrosup64.dll is not marked for installation

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

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

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 : Ensure there are no lingering keys for

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

Run your Adobe installer again until it crashes with Error 2753.

The error is a critical Windows Installer conflict that completely blocks users from installing, updating, or uninstalling Adobe Acrobat or Adobe Acrobat Reader. This error triggers when the Windows Installer database (MSI) detects cached, corrupt, or leftover registry data from a previous 64-bit Adobe installation. Because the installer believes a newer version of the acrosup64.dll file already exists on the system, it refuses to overwrite or handle the file, grinding the deployment process to a halt. Type msiexec /unreg and press Enter

To solve this, you must trick the OS into forgetting the old DLL exists, then force the new installer to treat it as a fresh file.

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