We are having the EXACT same issues with a few Ser8 machines we just purchased. Updated the BIOS, reset BIOS settings/CMOS, updated all drivers. After all the fixes, the random freezes and reboots have become worse. There is something fundamentally wrong with the MB, memory, SSD, BIOS or OS. Not sure which yet - but really do not want to spend any more time on these flaky, buggy machines. We have already wasted dozens of hours trying to troubleshoot and fix.