I have USB ports at the front of my computer and I guess they're not working properly. I've tried to configure them and plugged a pen drive for testing, but it did not recognise. For my surprise, the pen drive is not recognised in any other computer. I tried another pen drive, and the same thing happened again. The two pen drives are not working now. Does anyone know if a pen drive is repairable? How these USB ports brake the pen drives?