I'm working on a laptop for a friend, and I can't quite figure out what the problem is. All of a sudden, every time you plug something in one of the USB ports it comes up as "Unknown Device" whether it's a thumb drive, e-dvd drive, even an iPhone. All the ports are fine under device manager, nothing unusual there. I figure this might be a virus of some sort, because I found limewire on the comp, and because the laptop suffered no trauma. I've already scanned with malewarebytes and Avira antivirus, but nothing comes up. Oh and when I try to scan with MRT it freezes in various places :/ Any suggestions are appreciated. It's a Gateway M320x-ct0