ah… this sounds a bit different and therefore good detailed infos in first issue-report are so important.
Usage of a DAW is not comparable with a Game like MSFS. Its absolutly different system-load scenarios. As example a mainly zero GPU usage in DAW vs 100% all-the-time GPU usage in MSFS.
( and GPU is often, not allways, the cause if the pc shutdowns )
We had some topics with the ucrtbase.dll and 0xc0000005 ( different to …409 ).
So far I remember it was the more tricky variant. Some users report it in case they use Mods. Also the Anti-virus tool can cause issues and others had just issues with the hardware/drivers/etc. ( may be search a bit in forum ). But the common behavior in these cases was that the game directly crashs and the PC doesnt freeze / shutdowns.
You can may be do test-cases with limiting the FPS to a lower value as your current setting ( e.g. in NCP set max-fps 30 or less). If this helps, you know its somewhat with the gpu…
Not sure, but you can also check the usually “Nahimic” service. If it is enabled, try to disable it. But I thought it results in a …409.
Also noticable is, that some users reports issue with latest nvidia driver ( 497.09 ).
Ps: good checkpoint may be also Unofficial Reference Guide to CTD Solutions