Usb ports has power but not working

[Guest]

Hi I have a Windows 7 Ultimate and all of a sudden all of my USB ports stop working

None of my USB devices work but still get power from the USB ports

I checked my bios as well and it says my usb ports are still enabled

i went to Device manager and deleted the drivers under the Universal serial bus controllers, restarted my pc and still no change, then i right clicked on Universal serial bus controllers and scanned for hardware changes, then it said device driver was not successfully installed. HELP PLEASE

Thanks

 

[sudeshc]

Insert your USB drive and then goto device manager check if shows the devices if not then try using check for change in hardware option of Device manager