hi, i have been having problems with my USB ports. the 2 in the front have always said USB Device Not Recognized. and the 2 on the back used to work but now when i put something in, nothing happens. not even an error pop up. i have tryed updateing drivers i even went in safe mode on deleted all the USB drivers so they would re-install but still nothing. if anybody has any idea on how to fix this it would be greatly appreciated.