LAPTOP DOES NOT WORRY MORE?

A few days ago i noticed that sometimes my mouse and some tabs freeze more and more. After that, I usually restarted the laptop and had no more problems with it. For about 5 days but nothing can be done. As soon as I turn on the laptop it works for about 20-30 seconds, opens my recovered tabs and then freezes completely. The mouse does not move and keyboard shortcuts do not seem to work. In such a situation, I then hold the power button down so that the laptop shuts down. That works, but it's the only one. If I turn it back on then same game again. I tried to reboot right after booting up, but this was unsuccessful. Because the laptop was still "restarting" the next morning. Approximately 2 minutes after the mouse freezes, the screen darkens, but this has nothing to do with the battery life. At the same time, the noise he usually makes when he is working disappears. Now I wanted to ask if anyone knows what I could do? I do not want to reset the laptop completely because I do not want to lose any data (are important documents). I also tried to open the laptop in safe mode, also unsuccessful. I really have no idea what to do. Bringing the laptop for repair would probably be unnecessary, because it's only a small thing. On illegal sites etc. I'm not drifting around, I use the laptop only for documents and Youtube or games. I sincerely hope someone will find that can help me. Please do not explain it in jargon, I do not have that much idea xD

The laptop is a Lenovo ideapad 110 and I have only had it for about 3 years.

Build the hard drive or SSD and try to boot from another drive with another PC. If that works, it's up to the laptop hardware. The only thing you could test is the RAM bars and the temperatures.

After three years, it may happen that the laptop overheated by too much dust, so cleaning and changing the thermal grease would also be an option, although I do not think the CPU will not last 2 minutes to get badly cooled, so should something else!

I would remove the hard drive, back up the data, clean it up and put it back on. And create a second partition, ie share the hard disk virtually. Since I would save everything important that only windows under c: is running. Then you can also format without much data loss. Then only c: is formatted

So on d: the important data and c: windows

Remove plate.

Hang plate in another PC.

Secure data.

Plate back into the notebook.

Replace Windows.

If all goes well then your hardware o.k.