So I just built my new PC less than a month ago. When I put XP on I had no problems with my USB ports not working. So last night, I formatted my hard drive and reinstalled windows. At first, the USB's worked. I was using my keyboard and mouse no problem. But after installing my chipset drivers (i think this is when it started) and rebooting, none of my USB devices work. My mouse laser and USB hub come on when I reboot, but shut off as soon as the first windows xp screen comes up. Any ideas? Are there any generic drivers I can use?