Turned on computer today and a message constantly pops up from something called Antivir, it's saying my PC'S infected and needs fixed, it's also managed to appear on the little bar at the bottom of the screen, not being very good with computers can anyone tell me how to get rid of it, i have security with McAfee, i've checked this and all seems to fine, it's really bloody annoying and i'm starting to get worried about security now, btw, i can't seem to see an uninstall button anywhere, any help greatly appreciated.