I reformated my hard drive,now my computer don't see my USB ports,why?, How to fix ?.Using windows xp home.

Did you reload your motherboard drivers?

Yes I reloaded all motherboard stuff.I tried to delete all usb stuff in the device manager,then restart an let the comp find the new hardware,yes it found it and it says all the devices are working correctly but if I plug anything into the usb ports it doesn't recongnize it. It also don't show the usb [/QUOTE]computer.

Yes I reloaded all motherboard stuff.I tried to delete all usb stuff in the device manager,then restart an let the comp find the new hardware,yes it found it and it says all the devices are working correctly but if I plug anything into the usb ports it doesn't recongnize it. It also don't show the usb computer.

Under Services verify that Plug and Play is Started and set to Automatic:

start Run... services.msc

Also try plugging in an USB device before powering on and see if it gets detected.

Another shot would be in your BIOS Setup under USB Configuration (if such exists for your board).