Solved Login account at startup that is listed as first 5 letters of Microsoft email account, does not allow login

After I changed my laptop name, at startup I now get an account titled as the first 5 letters of my user folder name and it is also the first 5 letters of my Microsoft outlook email account.
There is no such account. It requests a password, but of course there is not one. I tried several of my usual passwords, but none worked.
There is an alternate account option, which I use to log in, but it always opens with this non-existent account. l don't use password logins, so it's quite annoying.

Hello fen, and welcome.

Did you by chance set up netpliz to automatically sign in to your account at startup?

If so, then this is normal when change the computer name afterwards. You'll just need to set up netplwiz again like in option one of the tutorial below to update it.

Thanks a lot.

Have had this problem before, but never new the cause. Probably did a factory reset to fix it.

Who knew it could be so simple.

I set up both my local and my Microsoft accounts for must enter password at startup which then got rid of non-existent account. After that, just had to uncheck the "must enter password" and everything is normal again.

Great news.