This is NuGet packages, not VS packages that you install. NuGet packages are downloaded automatically when a build occurs. Based upon the error it seems like you're missing the official package source but there could be something else going on.
- What type of project did you create?
- You are getting these errors when you build correct?
- In Visual Studio open Package Manager Console (under Tools \ NuGet Package Manager).
- What package sources do you have listed?
- Type
Find-Package Microsoft.Windows.SDK.NEt.Ref
and verify it returns stuff.
The packages you mentioned are normally not referenced directly in your builds but indirectly based upon the SDK your project was created with. If you're referencing these packages directly in your project then that is a problem. Sharing with us your project information would help clarify this.