No worries. :)

I just meant "at boot" as being before Windows startup screen after restarting the computer.

I'm glad to hear you have a workaround for now.

Just to verify, did you check the...

I'm not sure what's going on, but I would recommend to back up anything that you don't want to lose, and reset Windows 10 to start fresh.
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The netplwiz option is the same as I posted in post #2 below. If you check the Users must enter a user name and password to use this computer box, do you still get this "incorrect user name and...

If you like, you could try resetting Windows 10 at boot instead.

https://www.tenforums.com/tutorials/4130-reset-windows-10-a.html

You might go ahead and do a full scan of your system with an AV program (ex: Windows Defender) to help make sure it's clean.

As a test, check the Users must enter a user name and password to use this computer box and click on OK in netplwiz in OPTION ONE below to see it that stops it.
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I'm glad to hear that it seems to be sorted for now.

If you like, you could try doing a quick system restore using a restore point dated before this happened to undo and hopefully fix it.
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Hello Barb, and welcome to Ten Forums. :)

This usually happens if you have Windows set to sign in to your account automatically at startup using netplwiz, and then changed your password, user...