Started getting this at first once per day. After a week or so I began getting random reboots (no blue screen, just a reboot). The most recent hardware/software added was logitech MX revolution bluetooth mouse with newest logitech drivers and a usb 4 port hub. I uninstalled all of that but still got random reboots. Fresh format of XP pro w/sp2 and all updates. Ran for about a day and got another Bugcode_usb_driver errow. Nothing in the event view either which I thought was odd. Google tells me it is more likely a device than a driver. Currently I have unplugged all usb devices (hubs/keyboard/mouse). Only thing is actual usb ports on motherboard. I still wanted to update my USB drivers. All of them are from 2001/2002. Windows update says those are the only/newest ones available. It is usb 2.0 btw. I also ran memtest all night long w/no errors because at least one google link mentioned that. Any ideas?