Hi I lent my computer out and when I got it back it had a virus. It has changed my desktop and displays a red screen. It has also changed my start up menu so that I can't access anything. It appears to have changed my BIOS as it no longer recognizes that their is a hard drive present. My computer now will not start up once it starts to boot it stops and says it is mssing a system config and asks for the original start up disk to try to fix the problem, unfortunatly I don't have this disc. Please Help