This did the trick!  There were 3 keys remining in the registry.  I'm not sure if lingering keys was the issue as I think there was another file Revo identified that was deleted.  Either way, it is now syncing the blockchain!

Thanks so much to everyone's quick responses!

There is no bitcoin directory at this location and I've searched for a "debug.log" file and can't get a hit.


I think it was a windows upgrade.  The syncing was occurring so everything was working at that time.  Core hadn't run for long and I decided to update another computer as there was a supposed windows security update and I think I got trigger happy and rebooted multiple PCs including the one running core.  So, not electrical but certainly an interruption in the middle of synching.

Yes, Bitcoin Core 21.1

So, began installation of Bitcoin Core on Windows 10 and it was working on syncing.  The computer shut down and after rebooting it will no longer run.  I can see the application under task manager for about 30 seconds then it simply disappears without leaving a trace.  Is there a log file or something I can look at?  I've tried uninstalling multiple times and removed all directories and while it will "reinstall" it will not start the GUI and no background tasks seem to be running.  Any ideas on how to get it setup and running?

Bitcoin Client Software and Version Number: Bitcoin Core 64-bit
Operating System: Windows 10 Pro version 21H1 OS build 19043.1110
System Hardware Specs: Intel i7-3770S 8GB RAM
Description of Problem: App will not run
Any Related Addresses: N/A
Any Related Transaction IDs: N/A
Screenshot of the problem: Nothing ever appears on screen
Log Files from the Bitcoin Client: Can't find any