I downloaded a search engine by mistake and immediately went to add and remove programs to delete it. PC froze and I tried to run restore disc and now it won't boot up. I get and error message that windows has detected a registry/configuration error.When I try to continue I get access denied when the mscdex.exe /d:IDECD000 /L:M prompt comes up. It then say wait while Setup updates your config files and it then does nothing.