For those of you using NPM on Windows, and **especially those using Visual Studio 2015** - If you are experiencing problems with errors during, say, package restore, I recommend you take a look at https://lnkd.in/eMRdYry. The version of NPM installed with Visual Studio 2015 seems to be out of date; upgrading to 3.2.2 using this tool helped resolve a number of issues I was experiencing with large number of parallel downloads.