Windows 10: Users suddenly appeared on my Win 7 login screen. Now I can no longer access.

Hello all you happy people. I have a quick question. I was trashing some old computers at work to make room for some new old computers. I noticed a small Dell Octiplex 3020 with Windows 7. So I took it home because it has a stereo output AND a stereo input, which is great for studio recording. I was surprised that there were no users on the login screen, but I wasn't surprised that it immediately started looking for a domain to touch base with when I started it up.. That became annoying after a while, so I started looking for ways to make it not do that. Long story not quite as long, After a c

:)

 

access BIOS settings in Win 10

I have an 8-year old computer running Win 10. I need to access the BIOS settings. It used to be the holding down the F2 key during startup would bring up the BIOS screen in Windows computers. But this no longer works. A web article listed a complicated
series of steps leading to a reboot . . . but still no access to BIOS. Any suggestions?

 

How to remove a user from the list on the login screen

To permit the sharing of files I need to add a user to my Win 10 PC with administrator permissions. I do not want anyone attempt to login using this user name but it appears in the list on the login screen. I have read a number of other posts where they refer to modifying the registry specifically modifying the entry in Winlogin to implement this.
I have searched the registry but cannot find this key or value anywhere.
Where is this entry and what do I have to add to remove a specific user from the list of users on the login screen?

 

Is it possible to modify the default User Icon on the login screen?

Here is a screenshot of my two user accounts showing two different icons. When I login to either account the icon shows on welcome, login. lock, switch user and any other screen where users appear. Dont know much about png etc so never touched those files. I have found many things changed in Win10 from Win7. All I can say is my user icons are the way I want them and I changed them using the method I suggested. Sorry I cant solve your problem but I'm sure someone on this site will eventually come up with a better answer than me. Regards .