Installing Angular-CLI on Windows 10
<p>I had installation issues of angular-cli on Windows 10 system. 
    The errors were related to Python dependencies and node-gyp. Something as below :</p>

<pre><code>&gt;execSync@1.0.2 install C:\Users\UserName\AppData\Roaming\npm\node_modules\angular-cli\node_modules\execSync
node install.js
[execsync v1.0.2] Attempting to compile native extensions.
{ Error: spawn node-gyp ENOENT
at exports._errnoException (util.js:1007:11)
</code></pre>