i m using windows xp on my desktop. it was working good but i got one flash drive 8 Gb n connected to desktop but after that it started work dead slow on any operation on that computer. i disconnected usb it start working fine. then i tried my camcorder via usb with the same desktop n results were same. Can anybody help me out what reason reason could b n what should i do to resolve the problem while using usb products? once i noticed when i plugged in usb camcorder at the taskbar the message comes your usb may perform slower for high performance install high speed usb driver.