notebook sometimes freezing on all games

You ever cleaned it inside?

It can be a number of hardware pieces up till windows just being too cluttered with junk.

Can be the memory controller. Or you simply running out of VRAM and the game swapping assets.

Try disabling superfetch and see how it does

Sounds like a memory streaming issue of some sort, so could by your hard drive, RAM or VRAM. Try reformatting, if that doesn't help try removing memory/RAM sticks (you likely have two 3GB ones, so remove the first one and if that doesn't work put the first back in and try with just the second removed). If that still doesn't work you're probably out of luck.

You should run some kind of monitoring software (I use MSI Afterburner) to record your GPU, CPU, RAM, etc. usage and determine if there are any suspicious spikes. Without such diagnosis anything anyone we can say is pretty much guess-work.

Is it a hdd or ssd?

If it's an hdd, your drive may have some dead sectors, which can cause incurable micro-stuttering.

Could tell more about how often it freeze? Did u find something same for all freezes (it could be in-game explosions, sound of notebook)?

The problem is from the video card, more precisely from the video driver.
Try installing an older driver on both video cards and test again.

more info
https://imgur.com/a/iAJKq5i
https://www.userbenchmark.com/UserRun/19486413

tried forcing amnesia to use intergrated GPU.
nothing changed.

Crystal disk infos shows that both ssd and hdd are ok