I was working with my arduino uno and that was working well till last night. I was trying to add l298p motor shield and after a few times of testing without any achievement, my PC suddenly did not recognize the arduino. The device status in device manager is :

Windows has stopped this device because it has reported problems. (Code 43)
A request for the USB device descriptor failed.

What should I do now?? My OS is windows 8.1

I was working with my arduino clone and that was working well till last night. I was trying to add l298p motor shield and after a few times of testing without any achievement, my PC suddenly did not recognize the arduino. The device status in device manager is :

Windows has stopped this device because it has reported problems. (Code 43)
A request for the USB device descriptor failed.

What should I do now?? My OS is windows 8.1

I was working with my arduino uno and that was working well till last night.
I was trying to add l298p motor shield and after a few times of testing without any achievement, my PC suddenly did not recognize the arduino.
The device status in device manager is :  Windows has stopped this device because it has reported problems. (Code 43)
A request for the USB device descriptor failed.

what should i do now??
my OS is windows 8.1

I was working with my arduino uno and that was working well till last night. I was trying to add l298p motor shield and after a few times of testing without any achievement, my PC suddenly did not recognize the arduino. The device status in device manager is :

Windows has stopped this device because it has reported problems. (Code 43)
A request for the USB device descriptor failed.

What should I do now?? My OS is windows 8.1