Well, i had a virus, but my usb ports worked fine. Anyway, i had service pack 1, but needed to install 1a to help prevent re-infection of this virus. After i installed, 24 hours later... i notice usb ports didnt work. I know there is a known compatability issue with SiS 7001 PCI and i went to usbman.com and tried thier methods. tried some methods on here too... including the one where i plug it into the back of my comp instead of front... and stil nothing. I believe this issue is un-fixable.... microsoft = ****e :-\ Its beyond a joke! Can someone help?