How to Remove the Previous Owner's Name From a Computerby Neil Edwards
Whenever a copy of Microsoft Windows is registered on a computer, it prompts the registering user to enter the owner's name and the name of the organization with which the owner is affiliated. If your computer changes owners or you want to change the name entered into Windows, you can edit the key that stores the name in your computer's registry.
Click your computer's "Start" button, type "regedit" in the Search field and press "Enter" to open the Registry Editor.
Navigate to "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion" by expanding the appropriate folders on the left side of the Registry Editor window.
Right-click the "RegisteredOwner" key and click "Modify."
Type the new name in the Value Data field and click "OK."