Problem with Arduino driver! Port option not visible. How to resolve it? I am not able to upload sketch because my Windows 8.1 PC is not able to recognise it. It used to work fine but suddenly my driver disappeared from my device manager and no light is shown on the Arduino uno led also.

I tried to uninstall and install the Arduino IDE again but still didn't work. 

Note:- whenever I connect the USB cable to my PC, I see a dim light glowing for few milli seconds.

Update:- Also my Arduino board is not dead since it worked when connected to other pc but not working with my windows pc.

What could be the problem? How do I install the port driver back?
Sometimes Windows will disable a given USB port if it think's the attached device is malfunctioning.  Try using a different USB port on your PC.  If that does't work try
rebooting your PC.