(chiming in)
Did you recently install or update anything that brought a background program that starts with the PC bootup, or a service? After this experience with a faulty Realtek/Lenovo updating service, that occupied any Ram it could get its bits on, and which was responsible for at least half of my crashes, I have become suspicious about background processes that get installed only for convenience while they aren't needed by the sytem (that includes 'experience' things that come with varius drivers, or the premature start of Adobe Reader, and a lot more of that kind).
Greetings, Polymachos
Räuberhöhle auf Belegaer, Breelandsiedlung, Ochsbott, Lange Straße 5. Vorsicht, Fallen!
Awkward Anomalities Arena in Breeland Homesteads, 6 Long Street, Ersward (Landroval) - Elderslade under attack!
Scared people tend to follow the flock, no matter which shepherd it has