If you have upgraded your Windows Operating System to Windows 10 Build 10122, then you might be seeing an activation watermark on the bottom right of your desktop. The watermark shows that the version of Windows which you are running isn’t activated. But you have already tried going to the Settings page and then “Activate Windows,” nothing happens. If that is the case then you should definitely follow the below steps.
Step 1: Right click near the start button and select the option which says, “Command Prompt (Admin)” It will open Command Prompt with administrator privileges.
slmgr.vbs -ipk PBHCJ-Q2NYD-2PX34-T2TD6-233PK
Step 3: Hit the enter button and after it completes, reboot you system.
Now you will no longer see any activation watermark. As it is an official solution, so it should work on most of the computers.
Give it a try and let us know in the comment section below.