Hi. I'm David, and I'm happy to help you.
Your minidumps indicate the driver "amdkmdag.sys" as causing the crashes. This driver belongs to your video card.
I suggest you do a clean install of the drivers.
Download the latest driver for your video card from the AMD website. Then use the free DDU tool to remove the current driver. Then install the latest driver using the installer you downloaded.
DDU: https://www.guru3d.com/files-details/display-dr...
AMD driver download: https://www.amd.com/en/support/graphics/amd-rad...
See if the system will work stable after this.
Feel free to ask back any questions.
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