What to do when your PC thinks that Windows isn't properly installed ...

The Activation troubleshooter is a built in tool on Windows that search the computer for problems and automatically recommends repair strategy to fix the problem. To do this: ...

But whether your device came with Windows 10 or you upgraded your PC with Windows 10 you bought from another source, you might need your product key to complete the activation.

Dealing with activation problems The first thing to do is to check Settings, Update & Security, Activation to see if your copy of Windows has been activated. If you see Connect to the Internet to ...