30088-27
Office install error 30088-27
What it means
The Office installer could not update or remove an existing installation, so the new install rolled back.
Common causes
- A pending restart after an update
- A damaged Office cache
- Another installer running
How to fix it
- Restart the PC and close every Office app before retrying.
- Clear the Office cache folder
%localappdata%\Microsoft\Office\16.0\OfficeFileCache. - Disable the antivirus temporarily during the install, then turn it back on.
- Use the offline installer if the download keeps breaking.