I have an Intel p4 with win xp prof sp2, and i just bought a logitech webcam. i installed the software and pluged it in but nothing, i checked the hardware device, and everything should be fine. (i tried uninstall the software, safe mode, uninstall the usb ports, but still nothing...i have a sony dig.camera and same problem there too....my computer works fine except....the usb ports!!! what shoul i do, any suggestions!! thank u very much!!!