Hi Dynamo,
My organisation is experiencing the exact same issue. We have multiple devices all running windows 8.1 which suddenly started experiencing BSOD's multiple times in a day.
I've taken a look at the crash dumps you uploaded and they are exactly the same as ours.
You mentioned you've made a change which seems to have resolved the issue:
I made a small change to a network share the day after posting my previous comment and haven't seen a BSOD since.
Could you expand on this and perhaps provide any info on what you've already tried and found?
Cheers