NPM Cordova Install - generator-karma does not satisy

I'm attempting to install cordova on my windows 8 machine but continue to have issues. When I run npm install -g cordova I get the following error:

The package generator-karma does not satisfy its siblings' peerDependencies requirements

I have nodejs installed correctly and configured in my PATH variable. I have also tried adding various karma dependencies to my package.json file in C:\Program Files\nodejs\node_modules\npm

I can also confirm Java and Ant are installed and added to the PATH variable.