When to use this guide: install stuck at 90%, repeated error codes, Office apps won’t open, or activation issues after install.
A clean uninstall + reinstall is often the most reliable fix.
Windows: uninstall Office completely
Open installed apps
- Go to Windows Settings → Apps (or Control Panel → Programs).
- Find Microsoft Office / Microsoft 365.
Uninstall
- Select Office → Uninstall.
- Follow the prompts until it finishes.
Restart your PC
- Restart after uninstall to clear locked components.
Mac: uninstall Office completely
Note: Office can be installed via Microsoft installer or App Store depending on your setup.
If you’re unsure, use the official Microsoft account method to reinstall afterwards.
Quit Office apps
- Close Word/Excel/PowerPoint completely.
Remove Office apps
- Open Applications, locate Office apps, and move them to Trash.
Restart your Mac
- Restart before reinstalling to clear background services.
Next: reinstall safely
Reinstall on Windows
Use your Microsoft account (Services & Subscriptions) to download the official installer.
Reinstall on Mac
Download via your Microsoft account and sign in to activate after install.
FAQ
Is this an official Microsoft website?
No. This is an independent educational guide and is not affiliated with Microsoft Corporation.
Will uninstalling delete my documents?
Uninstalling Office typically removes the apps, not your personal documents. Your files are usually stored separately (for example, in Documents or OneDrive).
Do you provide paid support?
No. We do not offer paid support services. This website is informational only.