Sounds like Avast bullshit.
Few years ago I described installing this bullshit software as "Jumping repeatedly in a WW1 trench, waving maniacally two lit flares in yer hands, while having your uniform painted all bright yellow, shouting >>SHOOT ME IN THE FUCKING HEAD<< ". But that's not what I wanted to say.
What I wanted to say is, that I never encountered problem like one you described.
I only had problems with voice chats crushing game on my computer twice/freezing my computer for period of time longer than 20 seconds like, I don't know, every first match I play current day. Therefore, there must be something with your software, THEREFORE I assume you being an ignorant, pardon me, no offence intended. I have also noticed my laptop getting quite unusually hot during playing GOIO.
Computer is like a pet. If you let him grow dirty, fat and noisy - that's only yer fault mate.