Before you start (2-minute checklist)
Goal: A clean install + activation using your Microsoft account.
Most “Office setup” failures happen because of old versions, the wrong account, or using non-official download sources.
1) Confirm your Microsoft account
Make sure you can sign in to the Microsoft account that owns the subscription or license. If you have multiple accounts, note which one is correct.
2) Check your internet + storage
Office installers can be large. Use stable Wi‑Fi/Ethernet and ensure enough free storage before starting.
3) Avoid third‑party installers
Only download Office using your Microsoft account on the official Microsoft website. This prevents unsafe downloads and activation errors.
4) Remove older versions if needed
If Office is already installed and broken, a clean uninstall usually fixes “apps not opening” and “stuck at 90%”.
Safety note: This guide does not ask for product keys, payment, or remote access.
If any website requests payment for “setup help,” treat it carefully and use official Microsoft resources.