My all installed engine is freeze

Please tell someone what’s wrong.
When i run my project and try to choose plugin or create material everything freeze the engine.
I tried to reinstall engine and the system ,Visual Studio 2017!
But not change.
And this problem is also experienced in the 4.21 engine.

Idea?

Screenshot: http://www.kepfeltoltes.eu/view.php?filename=278Desktop_Screenshot_201.png