Fairly straight-forward.  Just here for my own documentation /copy & pasting.  Official MongoDB wiki contains the same info.

1. Download binaries.  Unzip and copy .exe’s to C:\mongo\bin
2. Launch Command Prompt AS ADMINISTRATOR (right-click and run as administrator)
3. Within c:\mongo\bin run “mongod –bind_ip 127.0.0.1 –logpath c:\mongo\logs –logappend –dbpath c:\mongo\data –directoryperdb –install”
4. Go to Services and start / stop MongoDB.

MongoDB on STOP returns “Error 109: The pipe has been ended” … this is ok but the error is annoying.

• Open bug in MongoDB’s JIRA – http://jira.mongodb.org/browse/SERVER-1434
• Related Post – http://stackoverflow.com/questions/3559572/error-109-when-stopping-mongo-db-running-as-a-service-1-6-1