Hi
nachowitz
There is no detail information about what is the root causes of event ID 109, its only informed that your PC experiencing with shutdown
https://technet.microsoft.com/en-us/library/cc727090%28v=ws.10%29.aspx?f=255&MSPPError=-2147217396
Looking at event viewer, log files, dump files will isolate the issues which comes from OS and software side first. OEM PC like Dell supposed to be have diagnostic tools before windows login, also shutdown issue can be detected from light indicator. You
can start the troubleshooting from SW/Windows first or HW first, depend on you.
I suspected this issue comes from HW or software conflict. If you are not experiencing restart or BSOD, high possibility this is HW issue
If recently you upgrade your OS from Windows 8 to Windows 8.1, BIOS update (maybe needed, depend on manufactured requirement) and driver (needed)
fast boot and hibernate is related to Mainboard, graphic card and power, disabling temporary will help determine if this issue caused by that specific HW. Some of OEM manufactured combine fast boot and build in software, that's also can be suspected as root
caused
Other HW can be caused this issue is HDD, so I suggest you to isolate and test your HDD.
I suggest you also contact Dell for more details regarding HW troubleshooting
This information will be useful
http://www.dell.com/Support/Article/us/en/04/SLN285337