Can't start mongod with config file

The config file must be valid YAML.

Try modifying the sample file provided with the documentation, for example:

net:
  bindIp: 127.0.0.1
  port: 3979
storage:
  dbPath: D:\mongodb\data\db
  journal:
    enabled: true
systemLog:
  destination: file
  path: D:\mongodb\data\log\mongodb.log
  quiet: true
  logAppend: true

Not a mongo expert, but it appears from the mongo documentation that you should be using ":" as separators instead of "=".

Here's a link I found to support this:

[1]: [http://docs.mongodb.org/manual/reference/configuration-options/ "Mongo config file format"][1]