How to fix crashes and blue screens of death during gaming sessions?

I wouldn't say 90% of it comes from there. Sure, graphics drivers and RAM are often guilty, but not always. Before jumping into drastic solutions like reinstalling, it's worth doing a more methodical check. First, see if the crashes follow a pattern: do they always happen in the same game, or across various titles? Always after X minutes of a session, or random? That already tells you a lot. If it's just one game, it's probably a compatibility issue or corrupted file. If it happens everywhere, then yeah, we're thinking hardware.

Temperature and drivers are important, sure, but not first priority. I'd start with Windows Event Viewer (type "Event Viewer" in the search): that's where you find BSOD logs with specific error codes. That's gold for actually understanding what's going on. Meanwhile, disable overclock if you have it running, dial back graphics settings drastically just to test, and check if Windows is up to date. Then yeah, verify your graphics drivers (but you don't necessarily need to reinstall from scratch - often just updating them does the trick), and monitor temps and RAM stability with tools like Prime95 or MemTest86.

Reinstalling the game is still an option, but not the first one. Better to keep it as a last resort after you've ruled out system instability. In my case, 8 times out of 10 when it happened, it was Windows misconfigured or outdated drivers, not dying hardware.