Windows 10: Can't make changes without supplying admin p/w

So, I have one computer on my network that someone must have been playing with and now I can't make any changes at all!


When I tried to check settings for remote software I was having trouble with, I was prompted for my password not unexpected. Instead of being granted permission to continue, I got an error message stating, "We can't sign you in with this credential because your domain isn't available." there is only one domain and the affected computer is assigned to it as is the user.


Yet, when I check in the system settings it is on the one and only domain in the building! I can't even open an elevated command prompt because it wants me to authenticate using my domain p/w. I have even tried the domain admin account and I get the same message.


I tried to go into the local admin account via control panel and can't get in that way either any time I try any course of action, I am prompted for my admin password that results in the previously mentioned error message.


I tried activating the "hidden" admin account and, you guessed it, I am asked to authenticate.


My guess is someone got into the local user settings and changed or deleted the local admin account or password or something else.


I would REALLY like to avoid resetting and re-installing the OS but will as a last resort.


Does anyone have any ideas on how to get around this? And, yes, I know I need to lock down the local settings in group policies chastising myself.


I'm pretty frustrated at this point and may have left out some details, but I hope not.


Thanks in advance....

:)

 

Sign in without p/w issue

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Trying to eliminate the need for p/w at sign in, I ran netplwiz as I have always done.

Top USER ACCOUNTS is from the Install I've been upgrading for a long time
Bottom USER ACCOUNTS is from today's clean install on another machine

There is no:
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in the clean install
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