I've run the stress test several times for just over 1/2 hour each time and there are no stability issues
ew refreshes then after about 10 seconds my PC shuts down
so it looks like your pc is not 100% stable after all.
Set the bios to Failsave Defaults and test if the PC crashes then. Most programs to test load/stability do not cover everything to check if the PC is stable.
Basically the MSI AB is very invasive. You should set up EVERY software as an exception that should not be used by AB. (aquasuite, service, service helper ...) This software uses a similar behavior as a virus and not every software can handle it.
Maybe an issue with the PSU.