Windows 8 - How to show all users at lock screen

There is probably no way to do this but I'll ask anyway. I have disabled the win8 lock screen so I don't confuse my wife. When my computer locks it only shows my account at the login screen.

Is there any way to show all users at the login (locked) screen?

I have nothing to hide from my wife so she knows my password and just logs in as me. If it showed both users she would login to her own account instead of messing mine up. I know you can press the back arrow but if I tell the wife she'll get suspicious for no reason, you know how women are.

I don't know for the lock screen but for the login screen it is possible. But not as simple as it should be.

Follow the instructions on this page.

It involves changing the registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\UserSwitch. (setting Enabled to 1)

The problem is this change does not survive at the moment a user logs in. So there are also instructions to change this value after every login with a batch file and the Task Scheduler.

The batchfile should be like:

REG ADD HKLM\SOFTWARE\Microsoft\Windows|CurrentVersion|Authentication\LogonUI\UserSwitch /v Enabled /t REG_DWORD /d 1 /f

Run this file with a task in the Task Manager "at log on" of "every user".

Exact steps (with screenshots) are at this page.

Edit:
I found a way to do the same when you get the lock-screen in case of inactivity.

I discovered that when you disconnect with "Remote Desktop" you get the full-Switch-User-screen with all users. You can simulate this with the command tsdiscon.exe. We work from there... (You can test this command manually)

Now create a normal-"scheduled task", name it Switchusers. In the trigger-tab set a trigger on On workstation lock. In the action-tab set an action to run tsdiscon.exe. Press Ok.

Now, whenever you get the lockscreen, tsdiscon.exe is executed and you get your full-switch-users ;)

If for some reason this doesn't work you can also create the same task with trigger On idle and set the Start the task only if the computer is idle for on you desired idle-time and Wait for idle for on Do not wait and check Stop if the computer ceases to be idle (or else you'll get multiple login-screens after longer time-outs)

I had 2 different accounts, then I updated the wrong driver tried to do the System restore, it failed, I booted in safe mode, deleted the driver, and everything seemed to be back to normal.

Not sure which of these steps resulted in only showing my account for the logging in, which was strange assuming I checked accounts and her account was there, I even created a new test account, it didn't showed either, I've set it up as Administrator, and tried almost every of possible solution available on the internet. I was even thinking of making a 'PC Refresh'.

Then I found this.

In case this URL won't work I'm listing the steps here:

Create a Restore point before these actions so you know your registry is backed up.

1. Open regedit
2. Press Windows+R
3. Type regedit + enter
4. Navigate to [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList] You will probably want to right-click on “ProfileList” and click export to save the entire subtree in case something goes wrong.
5. You will find several subfolders or “keys” named something like “S-1-x-xx…”, open them one at the time.
6. Each should contain at least the three value-sets, “Flags”, “ProfileImagePath” and “State”, some will contain more
7. Look at the end of ProfileImagePath for the name of the user represented by the key You will usually have one for each user on the system, and one for each of the three system entries ‘systemprofile’, ‘LocalService’ and ’NetworkService’
8. Delete any key (i.e. the whole “S-1-x-xx” folder) that does not contain at least those three values. Also delete any empty key named default.
9. The welcome screen should now work as expected, showing the avatar for all registered users; enjoy!