: If you cannot uninstall, manually delete the Acrobat DC or Reader folder found in C:\Program Files (x86)\Adobe or C:\Program Files\Adobe .
"acrosup64.dll is not marked for installation" (often accompanied by Error 2753 acrosup64.dll is not marked for installation
The error message "acrosup64.dll is not marked for installation" (often appearing with Error 2753 ) typically occurs when installing or updating Adobe Acrobat Adobe Reader : If you cannot uninstall, manually delete the
The error "acrosup64.dll is not marked for installation" is a technical glitch typically encountered by users of Adobe Acrobat or Adobe Reader. This error usually surfaces during an update, repair, or reinstallation process of the software on 64-bit Windows operating systems. At its core, the message indicates a conflict in the Windows Installer database, where a specific component—the 64-bit Adobe Support Library—is recognized by the system but is flagged as "not to be installed," preventing the software from completing its setup or functioning correctly. At its core, the message indicates a conflict
Adobe provides an official tool to remove corrupted installation records. This is the method.
Third-party services (antivirus, firewalls, system optimizers) can lock or hide acrosup64.dll from the installer.
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