When I reach the stage of "Verifying DMI Pool Data" in the BIOS boot, the screen remains blank for about 3 minutes before I get to the XP startup screen. This has only occured after I disconnected an external USB disc drive. If I reconnect the drive there is no delay in the boot sequence. I've tried ejecting the drive and rebooting but the problem remains. The PC has a Phoenix Award bios but I can't find any options in the setup that correct the problem.