How to install/uninstall node modules in windows 7?

To install node module

1. Start command prompt as administrator. For help see this link.
2. Go to the folder where nodejs installed. Example: CD "C:\Program Files\nodejs\"
3. Again go to the folder of node_modules under npm. Example: CD "node_modules\npm\node_modules"
4. Execute command "npm install http-proxy"

To uninstall node module

1. Follow Step 1 to 3 of above.
2. Execute command "npm uninstall http-proxy"