Several factors can contribute to the occurrence of this error. Some of the possible causes include:
Once complete, run the update file ( .msp ) inside the same folder to update the software to the latest build. Summary Troubleshooting Checklist Action Item Why it helps Safely removes corrupt installation profiles. Delete AppData Folders Cleans out bad cached files preventing the update. Third-Party Uninstaller Removes orphaned registry entries. Manual Extraction Bypasses faulty bootstrapper installers. acrosup64.dll is not marked for installation
: Download and run the tool to scrub all traces of previous Acrobat/Reader versions. Several factors can contribute to the occurrence of
Locate the folder. If it exists, right-click and delete it. acrosup64.dll is not marked for installation
msiexec /unreg msiexec /regserver
Incorrect registry edits can damage your Windows installation. Create a System Restore point first.