my Windows 8.1 PC (see specs below) has recently started to have problem when, while in sleep mode, transitioning automatically to hibernation mode (the mode were your work is saved to disk and power completely shut off) according to the pre-set timer in Power Options. The issue is that it looks like it crashes during this transition and then reports.

I suspect a new driver or software to be the cause. Can somebody guide me on how to track down the culprit?

Best wishes,