On Linux, one can instruct the BIOS to turn on the computer at a specified time after suspend or even power off using rtcwake [1]. I don't know many things about Windows but I guess they are doing something like this.
Yeah, that's what i tried to turn off in the BIOS. It's actually one of the earlier UEFI enabled ones from MSI. I guess it's a bit bugged. It also tends to freeze when i have it open for too long. There are no updates anymore and i don't get a decent CPU for it, so i'll probably upgrade it soon-ish. Just not sure if i'll get MSI again or maybe try something else this time. Asus seems neat.