It can be a common problem friends that all a sudden all your USB ports will stop working , or your windows will irritatingly starts prompting  “USB not recognized” but for the error there is nothing to be worried , use the following steps and get a rid from this:





Go to device manager.

click on USB controllers , you will see a list of USb hub ports, click on each of them and unistall them one by one .

When you are finished uninstalling all your Usb ports just power off your pc and restart it after a period of 20 minutes.

When motherboard will boot it will install all the usb drivers again and you will find that all your usb ports will start working fine.

NOTE: In case of a laptop after unistalling all the usb ports shut down the laptop, remove its battery and then put it back after a period of 10 – 20 min.