Random shutdowns Kernel-Power 41 (63); EventLog 6008

Hello.

Truly hoping the fine folks of this forum can help me solve the mystery of the random shutdowns. I guess I'd be considered an average+ Windows user and have explored this forum in depth but didn't find quite the same issues as others.

Basically, I'm experiencing random shutdowns. Usually happens when watching youtubes/videos. Or, if no video, then on a page in IE that refreshes content after the page is loaded (ex: using the # search feature on Twitter.com). There is no BSOD - the computer just shuts down with no warning.

So far I have:
- run CCleaner & Malwarebytes Anti-Malware
- deleted Flash completely and have not re-installed
- run sfc /scannow with no integrity violations
- explored the possibility of COM Surrogate DLLHost.exe trouble - and therefore run Process Monitor, set the filter to include DLLHost.exe and I stopped running it after 125,000+ events by 1% complete
- took a look at the Event Viewer and found Critical Kernel-Power event ID 41 Task Category (63) and Error EventLog 6008. These are from today - there have been a total of 10 instances since March and 2 in November 2015.
- attached the DM Log

The computer is probably 5-6 years old and these problems have been recurring for a couple of months now. And it's maddening, as I'm sure you all know.

Any/all help with diagnosing and treating the problem(s) would be greatly appreciated.
Thank you, in advance.

ETA: Uncertain of where to post this, Hope this is the right place.

Worked fine all day. Reinstalled Flash and IE crashes/hangs when playing Flash-required videos.

And prior to that reinstallation, there were still a bunch of instances of COM Surrogate doing it's recurring thing.

It's been a lot of self-diagnosing (blind leading the blind?) - can someone/anyone take a look at the log files and see if there are any other suggestions or things I could be doing?

Thanks.

ETA: Removed Flash Player again last night.

Another crash this morning. Event viewer shows:

- Critical Kernel Power Event ID 41; Task Category (63) followed by
- Information Kernel Power Event ID 89; Task Category (86)
- Information Kernel Processor-Power Event ID 26; Task Category (4)

ETA: Uploaded new DM Log - this one appears to be more thorough than the previous one.