I just purchased some regcure software so that I can clean up the registry on my computer.  I did not know that this was a problem, even though I run my spyware programs and virus programs I thought I was covered and I just use my computer every day.  I did not think that there was anything else I really needed to do except maybe back up my files periodically.  I am very bad about doing that, I always forgets to back things up.  When I started having problems with the computer I started backing things up right away thinking that my computer might be done for, but it sounds like an easy fix.