USB problem

All of a sudden the response to the movement on my CH yoke and Rudder have S_L_O_W_E_D_ drastically. Thought it might have been a new video driver so restored old one - no joy. Rebooted, checked device manager, checked event viewer, calibrated - nada. Finally, unplugged the USB connectors and plugged them back in, calibrated and voila - works fine!Just curious, anyone run into this before? VicQ6600 G0 CPU 2.4 o/c 3.6Evga 680i A1 with P30 BIOS 2G XP2-8500 DDR2 1066FSB Mushkin 996535 RAM 5-5-4-12-2T320G 7200 HD partitioned for XP/Vista/Programs 2 - 74G Raptors in RAID0 500G 7200 HD for backup SATA DVD burner Evga 8800GTS 640 PCIx Kandalf LCS case w/ built in liquid cooling 850W Thermaltake power supplyVisit the Virtual Pilot's Centerwww.flightadventures.comRadar Contact Supporter: http://www.jdtllc.com/