My little problem looks like this. I usually play Steam SF and watch You Tube videos, this went on until a few days ago. I ran the CCleaner shortly before it stopped, I had "rummaged" a couple of days ago and made a couple of useful settings in my opinion. I have to say that my laptop is already a bit older and that I was running around 30 / 32h on those days. When I turned it on again, it did not play anymore and did not play anymore. My guess is that the CCleaner has either deleted something that prevents it now or has damaged some of the hardware such as the CPU / GPU, the processor, or the drive for a long time, and that's why it does not work.
Unsuccessful countermeasures:
Restore point until before the CCleaner run.
PC settings that make the PC faster.
Moved from Chrome to Opera, because of my assumption that Chrome could be too full.
Unnecessary stuff thrown from the hard drive, which can work faster / better again.
I'm really grateful for help.
Greeting Dominic
I could not watch any videos on my old laptop, it was the software
I'm sorry for that, but I was a few days ago and not anymore and this info does not help me with my problem
