Causes and solutions for when the screen is completely black and only the mouse cursor is visible after signing in to Windows 11

This time, we will introduce the causes and solutions for when the desktop does not appear after signing in to Windows 11, and the screen is completely black with only the mouse cursor displayed.

Cause

If the screen is completely black and only the mouse cursor is displayed after signing in, this is often due to a corrupted user settings file (NTUSER.DAT) or invalid registry value data.

"NTUSER.DAT" is a registry file created for each user account that contains the user's settings, configurations, and personal preferences.

*Windows loads "NTUSER.DAT" when you sign in.

If "NTUSER.DAT" is corrupted, or if an invalid value is set in the registry because "NTUSER.DAT" is a registry file, problems will occur when signing in or after signing in.

"NTUSER.DAT" is a very important file and should not be deleted or moved manually.

"NTUSER.DAT" is located in隠しファイルIt is saved as.

C:\Users\ユーザー名

If the registry value data is invalid, it is highly likely that the data has been altered by a virus, third-party software, or malicious third party.

approach

If you operate the registry incorrectly, it may cause problems such as the system being unable to start. Please make a backup in advance using system restore or similar, and proceed at your own risk.

• How to create and restore a system restore point
• How to open and back up the Registry Editor
• Windows 11/10 Registry Basics: Concept, How to Open, and Internal Structure
• How to Take Ownership and Change Permissions in Windows 11 Registry
  

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1. Press Ctrl + Shift + Esc on your keyboard at the same time.

2. Once Task Manager opens, click on "Run new task".

3. The "Create New Task" dialog box will open. Check "Create this task with administrator privileges," then type "regedit" and press Enter.

4. The Registry Editor will open, so open the following key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon

5. With the "Winlogon" key selected, check the value data for the string values ​​(REG_SZ) "Shell" and "Userinit" in the right column.

The normal data for each value is as follows:

"Shell":

explorer.exe

"Userinit":

C:\Windows\system32\userinit.exe,

Change these values ​​to the correct ones and restart your PC.

To restart, press Ctrl + Alt + Delete on your keyboard at the same time, then press the power button at the bottom right.

If there are no other issues, the desktop will be displayed.

If you can't solve it

If the above methods don't work, it's likely that a third-party UI customization app is the cause.

Speaking of UI customization apps, some of the most popular are "ExplorerPatcher" and "StartAllBack," so if you have any of them installed, uninstalling them should solve the problem.

However, some settings may not be automatically restored when you uninstall, so if you have changed any settings, please restore them before uninstalling.

If you cannot uninstall using only the cursor, try uninstalling it from Task Manager, File Explorer, or by viewing installed apps.

1. Press Ctrl + Shift + Esc on your keyboard at the same time.

2. Task Manager will open, so click "Run new task".

3. "Create a new task" will open. Check "Create this task with administrator privileges", then type "explorer" and press Enter. File Explorer will open or the desktop will be displayed.

Type "ms-settings:appsfeatures-app" and press Enter to display the installed apps, then uninstall them from there.

If nothing happens, try booting into safe mode.

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