Got my relatively new (less than a year old) PC working again after a critical crash and BSOD after updating my Avast virus detection software of all things. It took a while to fix because the PC was just shutting down constantly but so far so good - and no more Avast on my PC (though to be fair it could also have been a Win 10 Driver Signature Enforcement issue).
But now I can go back to my playthrough of Assassin's Creed Odyssey and ancient Greece.
A BSOD means one of three things:
* There's a hardware issue (for example, bad ram can cause a BSOD, as could an I/O error with the swap file, for example)
* There's a bug in the kernel or a device driver
* The BSOD was manually triggered
The first option is somewhat unlikely in your case, as it sounds like the BSOD has gone away without a hardware change.
The third option is unlikely, as you would know if you did that. (On Windows, this apparently requires a registry change and a key combination that's unlikely to come up in normal usage.)
The second option, therefore, is what I suspect. Anti-virus software has been known to hook into the OS kernel at a low level (something that actual malware also does, including some forms of DRM and anti-cheat software), so it could legitimately have been a bug in the anti-virus software.
(Note that this can happen on Linux and Mac OS, but it's called a kernel panic and does not involve an actual blue screen.)