title: npm-windows-upgrade not working
body: <p>When I run <code>npm install --global --production npm-windows-upgrade</code> it seems to go to work but then give me a few errors:</p>
  
  <blockquote>
    <p>Error: EPERM: operation not permitted, rename 'C:\Users\MyUserName\AppData\Roaming\npm\node_modules.staging\lodash-36ccc657' -> 'C:\Users\MyUserName\AppData\Roaming\npm\node_modules\npm-windows-upgrade\node_modules\lodash'</p>
    
    <p>Error: EPERM: operation not permitted, rename
    'C:\Users\MyUserName\AppData\Roaming\npm\node_modules.staging\lodash-36ccc657'
    -> 'C:\Users\MyUserName\AppData\Roaming\npm\node_modules\npm-windows-upgrade\node_modules\lodash'</p>
    
    <p>Error: EPERM: operation not permitted, rename
    'C:\Users\MyUserName\AppData\Roaming\npm\node_modules.staging\lodash-36ccc657'
    -> 'C:\Users\MyUserName\AppData\Roaming\npm\node_modules\npm-windows-upgrade\node_modules\lodash'</p>
  </blockquote>
  
  <p>I don't have a .staging folder under node_modules. Has anyone had this problem?</p>