I just restarted my laptop yesterday, but after the reboot it was suddenly extremely slow. I just opened it and hoped it would work again tomorrow. In the morning it was still slow and in Cpu z 1Kern 1Thread suddenly, although I have nothing adjusted. In bios, etc. I can't make any Cpu settings, since it is just a laptop and the mainboard does not have such settings.
Can anyone help me?
No, such mistakes are simply too complex.
You would have to look over it yourself and watch the background tasks, programs, etc.
Even if updates would still be there - equipment of the PC may also be decisive.
So nothing that could be solved here "just".