Windows 10: I cannot sign in to my PC. Upon entering the sign in screen, I get the message “something...

^^^When I click “Set up my PIN” I get a pop up saying “You need to install an app for this task. Would you like to search for one in the Store?” Nothing happens when I’ve clicked “Yes” or “No”.I’ve tried to restore my PC by holding the shift key and selecting Restart, but the only options when selecting Troubleshoot are “Startup Settings” and “UEFI Firmware Settings”.I believe the issue is that my PC is stuck in Safe Mode; I had enabled it to try and get my PC to automatically reinstall drivers that I had uninstalled, but now I’m unable to boot my PC without entering Safe Mode.How can I solve

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force default user account to always be selected on sign-in screen

A PC has Windows 10 (version 1703, build 15063.726) installed on it. A person named Robert has a user account on it, named Robert. A person named Jennifer has a user account on it, named Jennifer. The user accounts Robert and Jennifer are "Standard" type accounts. There is a third user account, named Adm, and it's type is "Administrator".

The PC specs are: laptop, brand Asus, model X550CA, cpu Intel Celeron 1007U 1.50GHz, 8 GB RAM DDR3, 500 GB HDD 5200 RPM, 120 GB SSD.

Windows 10 default behavior, case 1 - the Robert and Jennifer user accounts are both password protected

1. Jennifer turns PC on.
2. At the sign-in screen, the password field for the account Robert is shown.
3. At the sign-in screen, Jennifer clicks on the account Jennifer in the lower left part of the sign-in screen, then types her password and presses Enter.
4. Jennifer clicks on the "Start" button on the taskbar, clicks on the "Power" button, then clicks "Shut down".
5. Robert turns PC on.
6. At the sign-in screen, the password field for the account Jennifer is shown.
7. Robert clicks on the account Robert in the lower left part of the sign-in screen, then types his password and presses Enter.

Windows 10 default behavior, case 2 - the Robert user account is password protected, the Jennifer user account is not password protected

1. Jennifer turns PC on.
2. At the sign-in screen, the password field for the account Robert is shown.
3. At the sign-in screen, Jennifer clicks on the account Jennifer in the lower left part of the sign-in screen, then clicks on the "Sign-in" button.
4. Jennifer clicks on the "Start" button on the taskbar, clicks on the "Power" button, then clicks on "Shut down".
5. Robert turns PC on.
6. Windows 10 signs in automatically into the Jennifer user account.
7. Robert clicks on the "Start" button, clicks on the "Jennifer" button, then clicks on "Sign out".
8. At the sign-in screen, the button "Sign in" for the user account Jennifer is shown.
9. Robert clicks on the account Robert in the lower left part of the sign-in screen, then types his password and presses Enter.

Question 1

Is it possible for Robert to change Windows 10's default behavior, to the behavior described below?

1. Robert or Jennifer turns on the PC.
2. At the sign-in screen, the password field for the Robert user account is shown, even if Jennifer was the last person to sign-in and then click on "Shut down" from the "Start" menu.

Question 2

If the answer to question 1 is yes, then what settings does Robert have to make, in order to get the behavior described at question 1?

Changing "dontdisplaylastusername" is not the solution

By changing the "dontdisplaylastusername" registry DWORD from 0 to 1, Robert doesn't get the behavior described at question 1. After setting "dontdisplaylastusername" to 1, Robert has to type both his user account name, and his password, at the sign-in screen. Robert wants to type only his password, at the sign-in screen, and nothing else.

Why does Robert want to change the default behavior

The reasons Robert would like to change to the behavior described at question 1:

• he is the owner of the PC;
• he uses his PC frequently, Jennifer uses his PC rarely, therefore it makes sense that Robert should have one less click to do in order to sign in;
• he doesn't want to click on something in order to get at his password field, he wants to press the power button on the PC and then type his password (doesn't want unnecessary intermediate steps between pressing the power button and typing his password).

 

How to troubleshoot an error that appears only at Restart or Sign out?

I get an error pop-up error message not every, but almost every time I Restart or Sign out. It's the screen with blue background and on top of Restart or Sign out text an error window says:

Explorer.exe - Application error. The instruction at 0x000… referenced memory at 0x000... The memory could not be written.

Sometimes the error code is just zeros, sometimes random numbers. I have tried so much already to troubleshoot this. For example these did not help in any way:

• MemTest86+ (no problems)
• Disabling any Services, Autoruns/ShellExView entries
• Low resolution mode
• BIOS settings are fine, no overclocking etc.
• DISM.exe and sfc
• etc.

However, these do make the error go away:

• End process for explorer.exe before Restart or Sign out
• Safe Mode
• Creating a new user profile (almost the same as clean installing Windows, many full days of work)
• Uninstalling NVIDIA graphics driver (then the card is unusable, of course)
• Disabling Device Manager / Display Adapters / NVIDIA GeForce GTX 1080

I already contacted NVIDIA and the graphics driver is not the culprit. Something has gone wrong with the user profile as the same driver works just fine in a new profile (and there's nothing wrong with the driver anyway, it's just the Restart or Sign out process that has a problem).

What can I do to fix this? One useful thing would be to have a step-by-step procedure for the Sign out. So that it'd ask before continuing to the next step and list what it's doing. Or if I could just disable whatever it does when the error appears.

 

different lock screen and sign in screen?

Step 2b is labeled as Change the Login Screen Image, but the steps show you how to change the Lock Screen image. Step 2a is irrelevant. It only tells you how to change the desktop background.

What I want to do:
Set Spotlight as the LOCK Screen Image(s) - Done
Set the Win 10 Hero Image as the SIGN IN Screen Image - This is the one that shows after you click on the lock screen and you are able to type your password. If I uncheck "Show Lock Screen Image on Sign In Screen", it shows a solid blue background behind my Password box and user image. This is what I want to change to the Hero Image....