Acrosup64.dll Is Not Marked For Installation [extra Quality]

Here’s a technical write-up for the error “acrosup64.dll is not marked for installation”.

The most effective way to fix this is to completely wipe the slate clean. Standard uninstalls often leave behind the very registry keys causing the conflict. acrosup64.dll is not marked for installation

• Likely caused by an MST customization where the component containing acrosup64.dll was unintentionally set to 0 install state.
• Check the MSI component ID for acrosup64.dll using Orca or similar MSI editor.
• Verify if the component’s Condition is false during install.

If the cleaner tool doesn't work, manual removal of cached files may be necessary: Uninstall Adobe via the Control Panel Navigate to C:\Users\%username%\AppData In each of the folders, find and delete the Restart your PC before re-attempting the installation. 3. Advanced Registry Cleanup (For Experienced Users) Here’s a technical write-up for the error “acrosup64

Permission Errors: The Windows Installer may not have sufficient rights to write to the C:\Program Files directory. Likely caused by an MST customization where the

The Breakthrough

When All Else Fails: The "Extract and Manually Register" Method

If the error persists, the installer is fundamentally broken. Here is the nuclear option:

• C:\Program Files\Adobe\Acrobat DC\Acrobat\
• C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\

• Run as Administrator. (You already did.)
• Disable your Antivirus. (Unlikely to help; this isn't a quarantine issue.)
• Re-download the installer. (Worth a shot, but the error will persist.)