how to fix my microsoft office it giving basic version saying product is not supported and product activation key is requried but its not there?

If Office shows Unlicensed Product, asks for a product key, or says the product is not supported, use this order:

1. Sign in with the account that owns Office
   • Open Word or Excel.
   • If prompted, sign in with the Microsoft account used to buy Microsoft 365 or Office.
   • If the wrong account is being used, Office can show “We couldn't find any Office products.”
   • Check whether Office is attached to the account at Subscriptions.
2. Do not use a product key if Office was already redeemed
   • For Microsoft 365, Office 2016, and individually purchased Office apps, installation and activation should be done with the Microsoft account.
   • After a key is redeemed, the product is added to the Microsoft account and the key is no longer needed for reinstall or activation.
3. Check for multiple Office installs
   • Open Control Panel:
     • Windows 11/10: search for Control Panel on the taskbar, then open Programs and Features.
     • Windows 8/8.1: right-click Start > Control Panel > Programs and Features.
     • Windows 7: Control Panel > Uninstall a program.
   • Search for office.
   • If more than one Office version is installed, uninstall the version not being used.
   • Restart the PC, then open an Office app and sign in again.
4. Run Office as administrator
   • Close all Office apps.
   • Open Start, type Word.
   • Right-click Word and select Run as administrator.
   • Select Yes if prompted.
   • This can fix permission issues that block activation.
5. Update Office
   • If Office is preinstalled or not recognizing the product correctly, install the latest Office updates and try activation again.
6. If the product key says it is not valid
   • A “product key is not valid” message means the key has been blocked and will no longer work.
   • In that case, the documented action is to contact the seller and request a refund.
7. If the account has the product but activation still fails
   • Reinstall Office from the account’s install page instead of using a trial or mismatched preinstalled copy.
   • Use Subscriptions to install the version linked to the account.
8. If nothing works
   • Use the guided support option or contact Office support.

• Unlicensed Product and activation errors in Office
• "This product key has already been used" error in Office
• "Product key is not valid" error when activating Office
• Office error "The products we found in your account can't be used to activate"