I have installed Microsoft Office and entered the product key, but the activation wizard doesn't work. How do I solve this problem?

 Activate Microsoft 365 or a non-subscription version of Office

It means you likely do not have a valid license key. Purchase one.

Trying it via the cmd method might give you a more complete error msg if you are so inclined.

Type into the search field: cmd.exe

Click with the right mouse button on cmd.exe and select “Run as Administrator”

If you are running a 32bit Office on a 32bit windows or an 64bit office on a 64bit Windows, enter:

C:\Program Files (x86)\Microsoft Office\Office16>

Type below commond to revok this promt

cscript ospp.vbs /unpkey:Last 4 Digit of key

To Enter new key

cscript ospp.vbs /inpkey:your key