We have installed Visual Studio 2015 Professional on Windows 7. It was working fine. But after we installed updates from the menu Tools-->\'Extensions and Updates\' today the Vi
If nothing above works (like in my case) then open a registry editor, go to HKEY_CURRENT_USER\Software\Microsoft\VisualStudio and delete all 14.0 directories.
It will reset all VS settings and next launch will be like first one after installation.
Found answer here