I have just Upgraded someones Pc from Win98 to Xp Home. Everything went fine. After Installation when the Desktop appeared, a message on the screen says " Computer is infected - do not use" I scanned with Ad-Aware, AVG Anti - Virus and Spybot and they all came back negative. I also checked in the Programs Folder and there was nothing suspitious in there. When I go into Desktop Properties, I cannot change the Desktop Picture. All the options are greyed out. This is being caused by whatever this message is. I just cannot remove it no matter what. Has anyone else had this before?