I don't know if my problem is OS related.
I installed and created a few projects in VS 2013 in Windows 7 and everything is working fine.
But my workplace wants us to upgrade to Windows 10. So I installed VS 2013 (the same way I installed it to my Windows 7 OS) then I tried to open some of my works and got the following error:
The 'NuGETPackage' package did not load correctly.
In ActivityLog.xml it was something like this:
Could not load file or assembly 'NuGet.Tools, or one of its dependencies. The system cannot find the file specified.
I also checked Extensions and Updates, NuGet Package Manager for Visual Studio 2013 is in the list.
I tried to repair (in Control Panel > Programs) but still the error shows.