Hey All, I've never had any problems with my XP x64 SP2 rig until recently. After downloading and installing all Microsoft updates for XP x64, the latest drivers for my i7 920 rig, and flashing the latest BIOS, I have problems when plugging in external USB Hard Drives. Flash drives work fine. When I plug in an external USB Hard Drive, everything freezes. Explorer.exe crashes, and I'm unable to switch between apps. My computer still works, but without Explorer, I'm dead in the water. I can wait forever, but it never unfreezes or regains control. Explorer is crashed for good, and I can only restart. If I leave the USB External Drive in the computer as Windows XP x64 boots, I can use it without issues. However, if it's not plugged in when I boot, it will crash when I plug one in. I can't even bring up Taskmanager when this happens. At first, I thought maybe it was just one of my USB Hard Drives experiencing the issue (ran Western Digital tools on it and the drive passes 100% & reformatted the drive [long format] ). Same problem on all of my XP x64 machines. Tried a different drive; I have the same problems. Anyone have any ideas?