How to change registry ownership of gateway MA6 laptop

I have recently been given a trashed gateway MA6 laptop. I have done all the repairs to working order. How do I change the registry ownership so that I become the owner? I have been to ask the geek and the information that I found there doesn't work. I verified this information with my desktop also which is useless. I recently read a blog on this site where the guy had a Toshiba laptop that he purchased off ebay with the same problem. Does this information that you provided to him to change ownership will it also work on the Gateway MA6?
 
Back