Before installing a new version, it is critical to perform a "clean" uninstall to prevent license conflicts. Standard Uninstall : Navigate to Settings > Apps > Apps & Features , find the preview version, and select Deep Clean : For persistent issues, use the Microsoft Support and Recovery Assistant (SaRA)
The "Microsoft Office LTSC Professional Plus 2021 Preview has expired" message occurs because the preview version is a temporary license that has reached its end-of-life. To fix this, you must replace the preview license with a permanent one or install a supported version of Office . Step 1: Remove the Expired License Before installing a new version, it is critical
A: Yes. If you cannot buy Office, consider installing LibreOffice (free, open-source) or using the Microsoft 365 Web Apps (Word/Excel for free in your browser). Step 1: Remove the Expired License A: Yes