Windowed mode problem

hi. i have a problem about the windowed mode when i watch the 3D match. I am using Monster notebook 17.3" screen, 16gb ram, intel core i7 7700, nvidia gtx 1050ti 4 gb, 1 tb harddisk. When i play full screen match there isn't any problem but when i play windowed there is some screen freezing. I dont know why.

can someone help me and tell me whats the problem because i think my notebook specifications are good.

What is your desktop resolution and the one you're using in-game?

1920x1080p 17.3" , i am using same resolution in game.

pls help me :/ @mons

Sorry man, I'm all out of ideas. I suggest posting on the official forum to get more technical help