Hi there!
Until a couple of days ago i was running 2 accounts on my PC and did it for years without a glitch!
To make it easy to explain let say that account 1 is running on screen 1 and account 2 is on screen 2. Both accounts run in windowed mode.
Whenever i am playing screen 1, account 2 ( on screen 2) freezes to a halt and vice versa!
In task Manager i saw that the GPU is now allocating over 90% to one account and almost nothing to the other one. I never had that issue before!
But if i "click" anywhere else, let say on background screen, both accounts are running smoothly and GPU is allocating enough resources!
If it can help some of you, my video card is a Geforce GT640 and i am running windows 10.
Everything is up to date with the latest drivers of course!
Thanx for any helpful advice.