Good to know, thanks for the suggestion!
Oddly enough, I don't often have an issue when alt-tabbing, it's pretty rare for me. But, i don't alt-tab too much since i mostly use the overlay....it's just REALLY annoying when it does happen!

Sorry to hear that I tried it on windows 10 and never stumbled on any issues, also there's an alternative fix but it will requires downloading software called Borderless Gaming it forces windowed mode games to run on Borderless Mode which could be useful for old games that crashes or freeze when alt-tabbing and I just tried it with Witcher 1 and works perfectly.

you can find it on github just look for the latest release.

Not sure if this guide is still relevant, but it just popped at the top for me, right after I had a hard alt-tab crash...so, here I am.
Unfortunately, for me, this is not fix but rather created new issues. Windows 11 v.23H2
Ran as Admin no longer allows the in-game Steam Overlay to function, and sometimes causes other issues when I try to open the overlay- like the mouse cursor disappearing.
Also, 50% of the time the game will crash when I try to skip the loading screens and video.
Same happens when running in compatibility mode as well...=(

Clear and concise pictures walk-through, I followed the guide without needing to translate anything