Installation - Acrosup64.dll Is Not Marked For

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

Think of it like a grocery list: The list says "Buy milk." But next to "milk," there is no checkmark. The shopper (Windows Installer) sees the instruction but lacks the authorization to pick it up. acrosup64.dll is not marked for installation

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 "acrosup64

Solution 3: Manually Deregister and Register the DLL

Sometimes the DLL itself is correctly present, but its registration in the Windows Registry is broken. Action: Download and run the Adobe AcroCleaner Tool

3. Troubleshooting & Resolution Steps

3.1. Run Adobe Acrobat Cleaner Tool

Adobe provides a dedicated cleaner that removes all traces of previous installations.

• Action: Download and run the Adobe AcroCleaner Tool.
• Note: This tool forcibly removes installation files and registry keys, allowing for a fresh installation.

• Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData
• Press Ctrl + F and search for acrosup64.dll.
• Delete any key that references it. These are orphaned installer pointers.