I can't install UE4. Error code: R-1638. I deleted Mincrosoft Visial C ++ 2015. I reinstalled the launcher. Nothing happens. Why?

anonymous_user_ebb22d8c (anonymous_user_ebb22d8c) February 15, 2016, 12:06am 3

He uninstalled it because of these instructions:

I am running into the same error.