Win10: Customize the Lock Screen Background


When Windows starts, the Lock Screen is the first screen that is displayed.

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While you can customize this in Personalization > Lock Screen, this is a Per User setting.  As you can see you have 5 choices to choose from.

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You can find these files in C:\Windows\Web\Screen and as you can see, there are 6 images in this directory.  Microsoft intentionally added img105.jpg for this purpose.

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Modifying by Group Policy

You can make the change by opening Computer Configuration > Administrative Templates > Control Panel > Personalization.  Open “Force a specific default lock screen image” and set the Path as C:\Windows\Web\Screen\img105.jpg.

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Additionally you can set the “Prevent changing lock screen image” to ensure that this is not changed, although your users may not like this

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Registry Modification

Here you go

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Personalization]
"LockScreenImage"="%SystemRoot%\\Web\\Screen\\img105.jpg"
"NoChangingLockScreen"=dword:00000001

Results

After making this change you should have a standard Lock Screen background.  If you need to make a custom color, create a new image.  If you overwrite the img105.jpg, it may be later overwritten if Windows does a repair on its files.

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Edits

Apparently the Lock Screen displays the image, but adjusts the color on its own.  See my post Win10: Personalization Colorization Color (and Headaches)

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