Install MongoDB as a Windows Service

To set up xDB or MongoDB locally please carry out the below steps:

1. Goto https://www.mongodb.com/download and download MongoDB Community Server.
2. Install locally in C:\Program Files\MongoDB
3. Create Databases folder in C:\ MongoDatabases
4. Create Data Folder in C:\ MongoDatabases \data\db
5. Create mongo.config file C:\ MongoDatabases \ data \log
6. Open Command Prompt in Administrator mode and run:                                                    

C:\Program Files\MongoDB\Server\3.0\bin>mongod --dbpath "c:\ MongoDatabases \data\db" --logpath "C:\ MongoDatabases \ data \log\mongo.config” --install --serviceName " mongodb " --serviceDisplayName "mongodb" 

7. This will install MongoDB as a Windows Service. To start run Services.msc and start "mongodb"
8. All done and all you need to do now is point Sitecore at it.