While backing up activation files is best for avoiding the activation process, you should also always have your 25-character product key as a fallback.
: Open File Explorer and navigate to: C:\ProgramData\Microsoft\OFFICE\DATA (Note: You may need to enable "Show hidden files and folders" in your folder settings to see the ProgramData directory) . Identify the Files : Look for two specific files: opa12.dat : This is the primary activation file. opa12.bak : This is a backup of the activation file.
Microsoft Office 2007 is no longer supported by Microsoft, but if you still use it, preserving your activation is crucial—especially before reinstalling Windows or moving Office to another computer.
