Windows Aero gets turned off by iTCG?

This happens everytime I play iTCG for more than 3 hours.
Aero would suddenly turn off by itself in the middle of a game.
After closing the iTCG window for a few minutes, Aero turns back on by itself again.

I'm beginning to suspect it's some of nexon's fail code that somehow disabled Aero.
But then, I thought google chrome's sandbox design would prevent websites from making changes to my computer settings.
Dunno what to do, really doubt my computer have virus, I never download from untrusted sites, and this only happens with iTCG.

Hm, I know that Aero automatically decides that certain programs aren't compatible with it and switches to Basic scheme... probably same thing, somehow, though I don't understand how a webpage could cause that.

Aero might turn off if your computer doesn't have resouces enough. Don't know if that applies to this situation though.