Second monitor glitches when playing games on main monitor

[Eryc__]

I have a dual monitor setup, and when i play games on my main monitor, the browser seems to freeze or glitch out and not load on my second monitor.

Main monitor: BenQ 1920x1080 144 hz 24'
Second: Samsung 1920x1080 60 hz 24'

I tried different browsers, still same happens, please help.

When i had Win 8.1 it didn't happen, i reinstalled to win 7.

 

[Eryc__]

Fixed it by switching windows theme to default.