BIOS Reboot

Was wondering if anyone could chime in to help me diagnose what might have happened. Everything is now "appearing" to be fine afterwards but heres what happened. I came home and my studio machine had rebooted unexpectedly into BIOS. Upon rebooting again, same thing. Looked at maybe somehow the boot order changed I saw that only one external drive was appearing as a boot option. Researched a bit and I was able to restore the BIOS to Default. After that I was able to see my M.2 drive to boot into windows. Not ALL my drives are appearing it seems but the main one I needed is now appearing after doing that. Once into windows I got a DPC_Watchdog_Violation. Once that happened, I was a bit baffled still so I checked Event Viewer and couldn't find anything really out of the ordinary I thought, other than some windows updates, but they all appeared to be to Windows Defender... nothing to drivers that I saw. So, I performed a CMD SFC /Scannow, along with a chkdsk with all the options to search, scan and repair and it did come back that some files were corrupt. I also tried to update the drivers via device manager for the SSD... but had to go do Samsung to actually get the driver and just reinstall it. Any other suggestions of what it might have been? Anything I can provide to anyone that can help out and decode what might have happened?

Odds are the battery is nearly dead. At least, that's how my computers always behaved when the battery was dead or near dead. They boot with the only choice to <F1> or <del> into BIOS.

So.... I ended up resetting the BIOS after this had happened. It was the only thing that fixed and brought back being able to see the other bootable drives.

And as far as a dead battery, this is a desktop with a new 1200 watt power supply ..

ChadBonk said:

So.... I ended up resetting the BIOS after this had happened. It was the only thing that fixed and brought back being able to see the other bootable drives.

And as far as a dead battery, this is a desktop with a new 1200 watt power supply ..

CMOS battery.

if it's the computer in his description, the CMOS battery should not be that old... But I would still test it.