Desktop computer shutting itself off
My desktop computer just suddenly started turning itself off. No blue screen, no warning, no increase in fan speed, just completely powered down. When I tried to turn it back on, it shut off in the exact same way again while loading Windows. My first instinct was to open it up and do a full dusting of everything and that seemed to work at first, letting it last long enough for me to boot into safe mode and copy some stuff to a USB drive, but it still eventually shut off again (luckily not during the copy). My guess is there's some form of hardware failure and/or overheating problem but I have no idea how to diagnose which component is the culprit. Does anyone have any advice or resources I could use to figure out what's going on?