This is probably a Windows specific issue but I haven\'t found any information when googling this issue. I had been using ionic framework which relies on Cordova (or Phoneg
Via this question on SO it could be that you just have to do:
npm cache clean.
But, also try the other methods suggested there like adding the registry option:
npm install <packagename> --registry http://registry.npmjs.org/.
Or, if you've been mingling with the package.json file by yourself, check if it's valid.