Why can't i run 2 games at once?

[Keyword]

I have a high end pc, (RTX 3060, Ryzen 7, 16 gb of ram) but for some reason i can't run 2 games
but its not because of lag
Because when i try to run 2 games at once for some reason after atleast 7 minutes, one of them closes, i've tried this on any game and one of them just closes and it doesn't even crash, it just closes
anyone know how to fix this?

[Microsoft Powerpoint]

is the anti cheat system that cant run 2 games at the time