) typically occurs during an Adobe Acrobat or Reader installation when a previous version wasn't fully removed, or the installer package is corrupted. Quick Fixes for "acrosup64.dll" Error Run the Adobe Cleaner Tool : This is the most successful solution. Use the official Adobe Acrobat Cleaner Tool
The most effective way to resolve this error is a clean wipe of Adobe components before attempting a fresh installation. : acrosup64.dll is not marked for installation
to wipe any leftover registry keys or files from failed previous installations. Use the Offline Installer ) typically occurs during an Adobe Acrobat or
Navigate to C:\Program Files (x86)\Adobe (or C:\Program Files\Adobe ) and delete any remaining folders. acrosup64.dll is not marked for installation