My son was installing some Canon software for his new Canon Powershot A530 camera. The computer would recognize the camera but couldn't load the drivers for some reason. He then decided he should remove some of the current USB devices using the Device Manager. He stated he deleted three or four items titled "USB Root HUb" Now none of the USB devices I own work (two HP printers and a Maxtor external drive). Also every time I start the computer the New Hardware Found Wizard pops up five times. Each time the hardware is "unknown". When I look at the Device Manager I see a yellow "?" next to "Other devices" and five yellow "?"s intended to Other devices all called "Unknown device". Anyone have any ideas?