"Scanning new and updated MEF components"
<p>I can successfully reproduce the problem at will.  Below  is my steps:
Environment: windows 10 Professional 64bit</p>

<ol>
<li>Run vs_community_ENU.exe to install</li>
<li>Choose the Microsoft web and Developer Tools</li>
<li>Let it done installing</li>
<li>Open it for the first time, I can see the ASP.NET Web Application</li>
<li>Close the Visual Studio</li>
<li>Open it up for the second time, it will show some upgrade: "Scanning new and updated MEF components..." and two or three more of
the undated</li>
<li>New project no long shows asp.net web application along with other templates</li>
</ol>

<p>How can I fix this problem? I uninstalled and reinstalled it for 5 times already and the same thing happen again.  I even installed VS2015.1.exe but nothing happened</p>