VS 2015. The package was not loaded correctly?

Question

visual studio

Hello. I wanted to try ASP Core, but it requires VS 2015 U3, and I have U2. My actions:

1. I went to the update manager, clicked "Update" on Update 3
   
2. exe downloaded. I launch, but I can not click the installation. *one
   
3. Removed VS 2015 U2 using standard tools and demolished the Visual Studio 14.0 folder in Program Files
   
4. Started installing VS 2015 U3 from ISO file
   
5. Installed a patch on top * 2
   
6. Also installed NET Core
   

As a result: the first launch of the program was accompanied by multiple dialog boxes with messages

. Restarting removed some messages. Then he created a project, new components of the system were involved, new errors appeared. Restarting didn't fix them.
I remember I had the same problem when I downgrade Visual Studio. Then only the demolition of the system helped. This time the demolition of the system is a very time-consuming operation. Help solve the issue.
Links:
1 - Visual Studio update 3 installer is trying to inst...
2 - Cumulative Servicing Release for Microsoft Visual ...

Answer 1

I also caught a million errors, starting with "The package "ExtensionManagerPackage" was not loaded correctly" The
following recipe helped me:
1. Run “Developer Command Prompt for VS 2017” as Administrator.
2. Go to the installation directory of VS2017. By default, this is: C:\Program Files (x86)\Microsoft Visual Studio\2017\Community (for Enterprise and Professional, most likely their own ending)
3. Run: gacutil -if Common7\IDE\PublicAssemblies\Microsoft.VisualStudio.Shell.Interop .8.0.dll
Spied from here:
https://developercommunity.visualstudio.com/conten...