Yardım Operation did not complete successfully because the file contains a virus ..

I Faced a problem today and want to post a topic for anyone facing the same problem
The problem is after building the Client and opening and closing the game
The game launcher disappears
And this text appears
"Operation did not complete successfully because the file contains a virus"
The problem is solved

from here ::


But it is not a complete solution
Now I want to know from the people of experience, why did this error appear?
To fix it
Thank's