The 'ProviderPackage' package did not load correctly

Question

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:

Answer 1

I got "lucky" and restarted Visual Studio 2013 and it worked. I have had other errors in which deleting the temp cache items cleared it up.

Side note. While Visual Studio 2015 is not perfect as of yet, and NuGet has become less friendly to use IMO, if my computer is restarted by the company domain network administrators OR especially when there is a computer losing power with a brown-out of some loss of power Visual Studio 2013 becomes a bit a "fun" to fix while Visual Studio 2015 projects for months seem to just open just fine as if nothing happened when I login.