I went in to regedit to change the registered users names from my ex husbands to mine, and ended up changing his name wherever I found it. Then I was getting an error message with my TiVo and the server. I contacted TiVo, they suggested that I revert my drive to before I messed with regedit. My Goback program now can't find a safe point to revert to. What should be my next step? Should I put in my system restoration disc?