Posted 22 February 2012 - 05:49 PM
Have you tried uninstalling it from device manager, rebooting the computer, and letting windows go through the "Found New Hardware"? Sometimes drivers get glitched and most of the time that is what works for me.
Next option would be to uninstall it again from device manager but this time checking the box that tells windows to delete the driver and downloading a fresh copy from Dell's website.
If that still doesnt resolve the issue, you may have bigger problems that may require further diagnosis.