Visual Studio error “Object reference not set to an instance of an object” after install of ASP.NET and Web Tools 2015
Maybe this helps: Delete the contents from the following folders: C:\Users\%userprofile%\AppData\Local\Microsoft\VisualStudio C:\Users\%userprofile%\AppData\Local\Microsoft\VSCommon Sometimes, you need to go to: [x64] C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE [x86] C:\Program Files\Microsoft Visual Studio 14.0\Common7\IDE and run devenv /resetuserdata. Expect, that all of your user settings such as Visual Studio layout, linked Microsoft account or start page might disappear.