Mary, Follow the instructions at the link below.
I downloaded Spybot Search & Destroy, but my computer froze and I was not sure if it had installed O.K. so I decided to uninstall and try again. When I tried to uninstall I got the message "C:\Program Files\Spybot-Search & Destroy\unins000.dat"File is corrupted. Cannot uninstall. I can't use System Restore as I turned it off when I was running a virus scan and I forgot to turn it back on! I would appreciate any advice.