Constant Overwatch and Blizzard app Crashes

So I got the game about two months ago, ran smooth as a baby's bum on some nice setting for an older(ish) computer, then it started getting frame drops, so I set it to high priority and play lowest setting possible. That is a fix for that issue, however, it has started randomly crashing - sometimes after a match or two, sometimes in my first match - where the screen goes black, the game closes after a minute or so, my blizzard app goes white, and I have to restart my pc or end all blizzard tasks in task manager, only to repeat the cycle.

Any ideas as to why this happens? I deleted and (re)downloaded the app and game, but that only bought me a few days of fixing.

Any ideas are appreciated, danke.

Edit: Also posted on tf.gg and battle.net

probably better to put this on blizzard forum where you can get in touch with the people that made the game.

You can always try reddit as well, bigger community, not sure this web site is the platform you need.

This platform is what the people need but they dont want....when this platform will became what people want they wont need it..this are the rules

I've had the same problem, it turned out my gpu temperature became too high after playing for a while. In overwatch options you can enable an option that shows your current gpu temperature while playing. Mine went up to about 90 degrees before shutting off. You could try to remove all the dust accumulation out of your computer. But im playing on a laptop and didnt want to open it up, so i downgraded my maximum processor status to 75% in the energy settings, that fixed the problem for me!