My computer is unable to recognize ANY USB devices (more details below)....my configuration is as follows: Motherboard: ASUS "P4P800 SE" i865PE Chipset for Intel Socket 478 CPU (RETAIL) RAM: Kingston HyperX PC3200 1 GB (512 mb x 2) CPU: Intel Celeron D "320" 2.40 GHz RETAIL (fan and heatsink included) "D0 Core" Video Card: ATI AIW 9600XT Power Supply: ENERMAX Noisetaker Series 420W Model "EG425P-VE SFMA 2.0" Case: Antec SuperLANBoy HDD1: Western Digital 160 GB 8MB Cache 7200 RPM HDD2: Western Digital 200 GB 8MB Cache 7200 RPM Floppy Drive: Mitsumi 3.5" Drive DVD Drive: Toshiba 16x DVD-ROM Drive DVD Writer: NEC 16x Double Layer DVD+-RW Drive Model "ND-3520-A" Operating System: Windows XP with SP2 here's what happened: my friend said all of the USB ports stopped functioning correctly as soon as he plugged a microsoft mouse into the PS/2 slot....he restarted the computer and plugged his mouse into the USB port and nothing happened. It is as if the Microsoft mouse did something that disabled something concerning USB functionality. I can't get any of my flash drives or my external hard drive to work. someone please help. do I have to reformat the drive? or is there a way to undo what the mouse "might" have done? so far I can see that the USB ports being detected in the computer under device manager because I can see them as "this device is working properly".