my usb such as mouse and thumdrive are not recognise after connect to my notebook.. before this happen, my fren connect his tumdrive that contain virus. after that usb unable to recognised. then format my notebook again but still face the same problem. my fren told me to format and install vista. but after doing so, the problem is still happen. is my notebook was hacked by virus? any solution or suggestion to fix the problem? help me please.