Change Your PC’s Registered Owner in Windows
If you’ve ever wondered how to change the name of the person that Windows is registered to, this is the quick tip for you. It’s not all that useful, but it might come in handy if you got a computer from somebody else.
Open up regedit.exe through the start menu search box, and then locate the following registry key:
Now you can find the RegisteredOwner and RegisteredOrganization keys in the right-hand pane. Change them to whatever values you want.
To show off the new changes, just type winver.exe into the start menu search box to see the About Windows box:
This should work in all versions of Windows