My usb port does not worked. device driver are allredy installed. and when checked the usb port it sows working. but when coonect any device it does not work. now i disabled all usb port in bios. when its enabled pc performence goes 100% and its proces very slow.
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Hi, There are basically 2 reasons why USB ports will not work besides being faulty. 1. The drivers are not installed (inf files) 2. The ports on certain motherboards can be disabled in the CMOS or BIOS setup.
To check if the USB drivers are installed you can open control panel>device manager. Scroll down to "Universal serial bus controllers and make certain these are present and installed correctly.
Also make sure your USB device is functioning properly by plugging in to a USB port on a different computer.
Please let me know if you need any further assistance. Best wishes, Graemevm
Unlikely to be issues with the OS. Have you recently upgraded to Win 7 from Vista or XP? and did the USB ports work with this OS? Do ALL usb ports fail or is it just one or two and are these the front USB's or rear USBs?
If these are case front/top or other panel ports, verify that the ports are connected correctly.
if ports are configured correctly, remove all usb drivers via device manager. then reinstall them. if the problem still occurs you either have corrupt usb drivers (probably not since 2 ports work) or the USB ports were damaged in installation or because of usage.
sometimes the ports will not clear their settings, try the object you are plugging into the 2 non-workign ones to another port hen try something you never plugged into the 2 non-working. if you still get an error, its a driver or damage issues
As you stated the device works in one slot but not the other , tells you there is problem with that usb port , don't use those ports , best thing to do is purchase a PCI USB card if you need more USB ports .
hi, see if you have installed any new devices/hardware to see if its conflicting, often grafics cards conflict usb devices, also just check that in the setup(when you boot up)that the usb ports have not been disabled or usb keyboard support hasn't been enabled/disabled. good luck!!