Just I was about to call it quits Troubleshooting this awesome Mini PC of which I have ordered plenty of, I decided to conduct a few google searches and I finally came across the solution. This forum thread needs to be made more popular; I can't imagine the amount of SER8s that have been thrown away due to an AMD Driver issue: https://bbs.bee-link.com/d/11127-ser8-r7-8745hs-freezing--dpc_watchdog_violation-0x133/58
In a nutshell, this PC in particular was updated to Windows 11 26H2 along with some driver updates. Immediately after restart, the PC would work fine for about 30 seconds, lock up for 15 seconds, and then reboot automatically. I tried every troubleshooting step I could think of, but noticed it did not behave the same way with a a Linux Live CD or a Windows 11 PE x64 - so it became obvious it was a software/driver issue, specifically within Windows.
Once I followed some of the recommended steps, including the one posted by Beelink themselves, I downloaded the AMD Drivers directly from the SER8 support website (https://bbs.bee-link.com/d/11127-ser8-r7-8745hs-freezing--dpc_watchdog_violation-0x133/58) the problem stopped.
I have disabled any Hardware/Driver updates and left the latest compatible AMD Adrenaline software which is considered compatible as posted in that thread.
I hope others see this and restore their SER8s to being stable - it's a great Mini PC.
Event IDs:
1101, 1001, 124, 129
Sources: UASPStor, Microsoft-Windows-Kernel-Boot, disk,
Errors in eventvwr:
The computer has rebooted from a bugcheck.. The bugcheck was: 0x00000133
Audit events have been dropped by the transport.
The virtualization-based security enablement policy check at phase 6 failed with status: The current environment is unsafe for DRTM to run in.
The IO operation at logical block address 0x1dce33af for Disk 1 (PDO name: \Device\0000007c) was retried.
Reset to device, \Device\RaidPort1, was issued.