quemu windows guest boots into bluescreen after kernel update to 4.12.14-lp150.12.25-default

[tsu2]

If you inspect your Windows system logs using the Event Viewer, you should find all the events related to your failed boot.

TSU

[Harald_L]

Sorry, unfortunately not. All event logs (system, application, ...) end with the successful shutdown before kernel upgrade, show nothing of the failed boot with new kernel and continue with the successful boot after returning to the old kernel.

In failure state the guest does not find the system drive at all, so is unable to boot or write events to the log on the missing system drive :-(

[tsu2]

Sorry, unfortunately not. All event logs (system, application, ...) end with the successful shutdown before kernel upgrade, show nothing of the failed boot with new kernel and continue with the successful boot after returning to the old kernel.

In failure state the guest does not find the system drive at all, so is unable to boot or write events to the log on the missing system drive :-(

You should look for the entries that relate only to your failed boot.
They're there, and you'll find entries that likely relate to your blue screen.
BTW -
Usually the Windows Blue Screen for Win8 and later also contain an error at the bottom... It may be helpful but I've found may not be enough to get the whole picture... You'll more likely need the full error plus what leads up to that error.

TSU