Hope you are doing great.

 

change directory to root drive "C:\", and type the command below into an admin cmd prompt window,

 

c:\mongodb\bin\mongod.exe --config c:\mongodb\mongod.cfg --install

 

then type net start MongoDB after which you will get the message "The Mongo DB service was started successfully"

 

Then go to the control panel Start>Administrative Tools>Services, scroll to Mongo DB in the list of services and change start up type to automatic, if you so desire. Press ok.

 

Now type c:\mongodb\bin\mongo.exe and you should be connected to the Mongo test DB.

Please try and let us know if you have any other issue so we can help you out.