I run a computer repair shop in N Ga and I've had a number of computers (desktops and laptops) come in this week that are having serious boot problems. Two desktops, one Dell, one HP, no longer process when powered on. Both are Windows 10, best I can tell. Fans only, no screen output, no BIOS, no heat, nothing. And about 6 Windows 10 laptops were stuck in startup failures looping from auto-diagnostics to rebooting. A few of the laptops required a 'refresh' to fix while some others can't boot to anything outside the internal HDD. I find it strange that Intel and some manufacturers (Dell, HP, etc) rolled out a firmware update (BIOS) only to recall the update a few days later after discovering various issues with the update. As you might have read, Linus Torvalds called the update "... garbage". I must agree based on his level of genius.
If I'm having a rash of these failures in my small town, I can only wonder what's going on in the rest of the world since this is so widespread as to effect about every device with a CPU inside.
Although I haven't determined for sure if the Meltdown/Spectre bug patch is the culprit, it sure looks like it could be and there's no way I know to flash a BIOS on a system that refuses to process. May have to drag out the floppy drive. Since BIOS chips are now solder to the board to save a penny, if it gets some bad code, you might be replacing the motherboard.
Anybody else have any suggestions or clues to this mystery?