yes i have... i used spyware doctor, spybot, drweb-sureit, but i havent used a anti-virus program cause even now i can't download the new windows defender... i don't know why my computer started missing files... but when i was uninstalling a game when i was having a hard time... the system restore worked and when i finally uninstalled the game i tried to go to system restore, it was just a blank screen then i tried to go to help and support that didn't show, when to search, the search companion file was missing so i only have a blank window open with the dog there and then i tried to go on msn and that wouldn't let me. and i just finish doing what you told me and that didn't work