title: How to run npm install for EEXIST error
body: <p>When I do an npm install I get the foll</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false">
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  <pre class="snippet-code-css lang-css prettyprint-override"><code>node_modules                                                                                                                \wdpr-grunt-tasks\node_modules\karma\node_modules\socket.io\node_modules\socket.                                                                                                                io-client\node_modules\engine.io-client\node_modules\ws\node_modules\utf-8-valid                                                                                                                ate&gt;node "C:\Program Files\nodejs\node_modules\npm\bin\node-gyp-bin\\..\..\node_                                                                                                                modules\node-gyp\bin\node-gyp.js" rebuild
  npm WARN optional dep failed, continuing utf-8-validate@1.2.1
  npm ERR! EEXIST, npm-cache\56f3dfab--cac                                                                                                                he-lodash-3-10-1-package-tgz.lock'
  File exists: 56f3dfab--cache-lodash-                                                                                                                3-10-1-package-tgz.lock
  Move it away, and try again.
  
  npm ERR! System Windows_NT 6.1.7601
  
  npm ERR! node -v v0.10.36
  npm ERR! npm -v 1.4.28
  npm ERR! path  ...                                                                                                              -3-10-1-package-tgz.lock
  npm ERR! code EEXIST
  npm ERR! errno 47</code></pre>
  </div>
  </div>
  </p>
  
  <p>How do I resolve this issue?</p>