Serial Port Not Working

Hello all,

I tried to connect the arduino M0 with my PC and it says :

"Couldn't find a Board on the selected port. Check that you have the correct port selected.

If it is correct, try pressing the board's reset button after initiating the upload. "

So I tried to check the port option but it is grayed out. In device manager the port is not shown.

Then as per the discussion above I tried to install the driver from "CH341SER.ZIP". It shows that :

"The drive is successfully pre-installed in advance!"..

Now,again when I am trying to connect arduino it is not detecting the board.

Is it that my board is faulty?? Should I have to check anything else??

Please help to solve this problem.

Any help is greatly appreciated.

Thanks in advance