No, i didn’t. It was an old Laptop that had not been used for a long time. I pulled it out of storage to see if it still worked. It was old and I was not going to use it for anything. The laptop battery was dead too.
I am with howard
Each time i read this type of message, i just change the cmos battery
But … there is always a but.
Most cmos batteries are cr2023, i buy the in bulk so they are around 3 euros each. Here comes the but. Newer laptops have either a battery in a fabricated holder which is soldered to a wire for the contacts, more expensive and harder to source, some now its a capacitor rather than a battery and you cannot change it as its soldered in place on the mother board for cost and space saving.
Would need your make and model to advise further
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DELL Optiplex 7060
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CMOS battery depleted?
Edit: as @easyt50 said, I just wrote before reading answers already given.
So change the battery, setup BIOS again.
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Okay.
Will take a trip to local computer guy and see.
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So I guess I only have one UEFI PC!! Still works great with W10!!!
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Oh yeah, that is not so serious.
Windows will always interfere with booting like that .
Set up your Linux to use grub for booting… that will probably fix the bios when you do install grub from linux.
It is better to have Linux control the booting via grub.
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Even better?
When bringing the desktop to computer guy for new CMOS battery, will see if an extra SSD can be set in, and use it all for Linux instead.
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I dont think it is a CMOS battery issue, not likely anyway
but
yeah, a separate SSD for Linux would be worthwhile.
Should be possible in a desktop. At worst you might have to add a card to get a SATA port.
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Last try at Linux, was with recent Mint Cinnamon.
Doesn’t it do a control over of grub by default?
Btw, if defective CMOS is not the issue for getting this novel “error” message (as per initial post) at boot, what is?
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Yes, as long as you choose to install grub
I might be wrong, it could be battery.
I was thinking of Windows overwriting the boot setup … it can do that with a Windows upgrade.
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That was on the back burner of my mind too!
Just did upgrade via DELL’s web site.
Even if computer has long expired its welcome there.
DELL was gracious in performing a few important upgrades.
Will give update on that situation tomorrow.
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@danielson
If you must have Linux on that W11 PC, then install VirtualBox and run Mint in a VM, works well on my W11 PC.
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Point taken.
Thanks! 
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Update, as promised.
Went to computer guy.
New CMOS is installed (for free!).
Issue still popped up.
So, changed time as per first line and all seems well now.
Why didn’t i do that before?
Figured since had set DWORD - RealTimeIsUniversal
that it didn’t need attention. Wrong!
After following up on all the posts here and suggestions, it displeases me greatly to have set this post as “solution”.
It’s not easy for an ol’ dog to learn new tricks!
Even the easy ones.
One thing is clear.
People who post here are cordial as they show interest in helping to resolve someone’s issues.
In a special way, think @nevj 's post about Microsoft update probably was cause to this most singular issue.
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Although this doesn’t contribute to fixing the issue it may free you from reliance on Windows: try VueScan to run your scanners. (www.hamrick.com)
They currently support more than 7400 types of scanners, have a Linux version, and during the years I’ve been using it, it has been perfectly stable.
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Interesting dig! 
Bookmarked.
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If no one else has suggested it, Your BIOS battery may have run all the way down. Try changing it.
We have been down this road cmos is the battery for the bios look back up at the history on this to see the suggestion, replaced by a tech for free
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Thanks Paul. I saw that right after I posted. (I’m okay at Tach but horrible at posts.)
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