When i started up my computer today i got warnings of spyware and stuff and my background changed to a large warning with a link to PSGuard anti spyware site.The psguard ran automatically and detected some files but could not delete them unless i purchase. I ran my antivirus(Avast)and antispyware(pop-up stopper)It found some stuff, nothing much. I deleted PSGuard. But i can no longer set or change my background as the option is gone from display in the control panel.If i right click a picture and set it as background i last one second and the the warning screen returns. What do ya think is up? I'm using winxp home.