I am unable to update or uninstall the NuGet Package Manager for Visual Studio 2012. I\'ve looked around to several solutions, but have not found one that works.
Ru
I have VS 2013 Pro installed. What solved this problem for me was to restart into safe mode and re-install NuGet there.
You may also want to look into Adam D's post in the link below (the add-in was blocked by anti-malware software):
Can't Update or Uninstall NuGet Package Manager in VS2012