
Originally Posted by
Mucski
The only thing I can think of is CPU heating. Some motherboards do not shut down your PC instantly, they try to spin down your CPU, which results in lag, and ultimately freeze. See if this happens only in resource hungry programs/games. May also be your GPU over heating. If your Laptop has a dedicated GPU that may be the problem or it's defect. Although in this case I would just re-install Windows and see if anything installed previously or some registry error caused the problem. Or you can just start uninstalling stuff, starting with programs that have a service (usually they appear next to the clock on the taskbar)