Cold Boot Hangup - Froze before Windows 10 Boot Screen

Good morning all!
Posting here since it appears to be a hardware issue.
I perform a full shutdown every night.
This morning on startup I got the (hardware?) Boot Screen and it froze there not moving to the Windows Boot Screen. I tried again from a full shutdown and all worked properly. [FWIW: Except failure to connect to Xfinity Comcast email which I'm treating as a coincidence for now.]
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I did a quick check of my C: Primary SSD knowing it was unlikely the problem. All was okay. And I poked around the Event Viewer and didn't find anything unusual, but may not have checked the right location.
For a sanity check I restored the system to 2 days prior.
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This desktop is getting old, though 2 of my drives have been replaced as was the RAM. All updates are done ASAP when they are offered and manual restore points done daily shortly after startup.
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I'm looking for advice on what tests I should run to try to identify a possible target.
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Thanks in advance to all who read this and to those who offer advice!
Best,

Hi.

When you power down you are not actually get a Cold Boot in the sense of a fresh copy of windows unless you have disabled Windows Fast Startup.

You get a fresh copy of Windows when you restart.

You could disable Fast Startup quickly by disabling Hibernation.

To command prompt(admin) or powershell (Admin) enter this command

powercfg -h off

Test. To reverse command you issue command again with the word on instead of off.

You can also hold the shift key down and click Shutdown to bypass Windows Fast Startup.

If the problem goes away you can permanently disable Fast Startup, there is a tutorial for that. If Fast Startup is acting up it is can be a driver. Look to see if any have been updated.


Ken

Thanks Ken,
I turned off Hibernate "many moons ago" and just confirmed it is off.
My primary interest is learning if I may have a hardware problem waiting to happen.
My thinking is, since the issue of 2 days ago when Windows failed to boot, there may be a hardware problem - Motherboard, BIOS, et al - needing to be addressed. If so, how can I diagnose that?
Thanks in advance,
Best,

Check Reliability Monitor (run "Perfmon /rel" from the search box or command line). It might tell you something.
HTH,
--Ed--

Thanks Ed! :)