Please check to see if your PC is producing any dump files, I will check those to see if they provide any insight into a potential cause of the system crashes.
Please do not upload a very large Memory.dmp file.
Open Windows File Explorer.
Navigate to C:\Windows\Minidump
Copy any minidump files onto your Desktop, then zip those up.
If there are no minidump files in that folder, go to this folder:
C:\Windows\LiveKernelReports\WATCHDOG
If there are any dmp files in that folder, copy them onto your Desktop and zip them up.
Upload the zip file to the Cloud (OneDrive... etc.), then choose to share those and get a share link.
Then post the link here to the zip file, so I can take a look for you.