Unreal Engine 4.21.1 won't start, what should I do?

Question

C++ / C#

Hello sofa experts. I wanted to ask you what is the problem.
I downloaded Unreal Engine 4 several times and everything is the same:
1. I click Run -> Wait -> Start
2. Then the UE4 window Loading 100%
3. Epic Games Launcher -> start button again
4. The Unreal Project Browser window appeared completely transparent, it may be present for a couple of minutes, and then it is cut down.
I did everything and restarted the PC, and reinstalled UE4, and launched it with exe, and did the same with administrator rights, and was on the old version. Same.
I ask the great sofa experts to help me.

Answer 1

Maybe just not enough RAM? Or with the drivers for the video card is bad? Too little data. Are there any logs in "c:\Users\\AppData\Local\Epic Games" or "c:\Users\\AppData\Local\EpicGamesLauncher"?