I installed Visual Studio 2012 and at a later date Update 2. After installing Update 2, when I load any project, I get the following error:
I had the same issue in Visual Studio 2013 for Windows 8.1.
The previous answers didn't work for me. I had to repair Visual Studio and then reboot my machine.
Another suggestion,
Run as admin, and restart the VS application.
Apply package update. Reboot.
Hope this helps!
From MSDN forums:
If still no help, I suggest you try repairing your Visual Studio installation or uninstall it and then reinstall it. If you want to reinstall it, I am afraid that you need a DVD or a fine Internet.
Doing the first three steps works for me.
In my case, I solve this problem by removing the Read-only attribute of the folder "Visual Studio 2015" in <C:\Users\myuser\Documents>
.
Usually this can be fixed by clearing the Visual Studio cache under:
Visual Studio 2012: %LOCALAPPDATA%\Microsoft\VisualStudio\11.0\ComponentModelCache
Visual Studio 2013: %LOCALAPPDATA%\Microsoft\VisualStudio\12.0\ComponentModelCache
This is Aaron's (Aaron Reed) answer from above, just copied as an answer instead of part of the question:
Fixed it... Fixed it... Fixed it...
I installed VS2012 on 4/1/13, so I went through each listed SQL item in the list, and right click --> Repair
From there I ran VS2012 and opened the target Solution file without issue.
My list: