Unable to start service of nav 2013R2

I have installed nav 2009 R2 and nav 2013 R2 on same server [windows server 2008 R2]. Today when I restart the server Microsoft Dynamics NAV Server[Dynamics] service was stopped. Then I tried to restart the service but it did not restart showing the following message:

The Microsoft Dynamics NAV Server service on Local Computer started and then stopped. Some services stop automatically if they are not in use by other services or programs.

What could be the probable issue of the problem and how to solve the issue?

Pleas check event viewer for more details

The gateway to these kind of issue open from event viewer. I have detected my issue from event viewer and then I proceed towards the solution.

Thank You!