Hi. I'm David, and I'm happy to help you.
The minidumps indicate the Nvidia driver "nvlddmkm.sys" as the cause of the crashes. No other driver is mentioned.
I suggest performing a clean install of the Nvidia driver as instructed below.
Download the latest driver for your graphics card from the Nvidia website. Then, use the free DDU tool to remove the current driver. Then, install the latest driver using the installer you downloaded.
(I suggest disconnecting from the internet during the entire procedure.)
DDU: https://www.guru3d.com/files-details/display-driver-uninstaller-download.html
Nvidia driver download: https://www.nvidia.com/en-us/drivers/details/278453/
(Run the downloaded file and follow the on-screen instructions to install the driver.)
See if the system works stably after this.
If the crash occurs again after doing this, please share the minidump it created.
If you need a tutorial for using DDU, I recommend the video below.
https://www.youtube.com/watch?v=bP-2B14Nckw
Feel free to ask any questions you may have.
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