Use Windows background as lock screen

Hi everybody.
I googled in order to understand how to automatically set my Windows 10 desktop background picture as lock screen picture: I'd just like that, everytime I change my desktop background, the lock screen change accordingly. But I have found only tips and tricks to get the opposite, that is using the lock screen pictures as desktop background. It looks like it's impossible to do what I want nad I find it surprising, since it looks to me to be an almost obvious feature (and for sure not difficult to implement).
Can somebody tell me something about?

Thank you :)
LVL 32
Marco GasiFreelancerAsked:
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JohnBusiness Consultant (Owner)Commented:
The lock screen picture can be set with Windows Spotlight to be somewhat interactive (like the lock screen on a phone). So it is not really just a picture.  Here is some information on the lock screen

So I do not see from this how you could have the lock screen change whenever you change your desktop picture.
But I do see based on the above here why you could get the picture used in the lock screen as your desktop.
David Johnson, CD, MVPRetiredCommented:
The problem is that the lock screen is a machine property and the desktop image is a user property.  To change a machine property one must run as administrator.
lock screen registry you will have to create this.
LockScreenImage SZ <path and filename of image>
WallPaper SZ <path and filename of image>

You may have to create System and Wallpaper
JohnBusiness Consultant (Owner)Commented:
You can change the Lock Screen picture as David describes, but since the lock screen code wants to use an app, I don't think you can automate for any time you change the Desktop picture.

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Marco GasiFreelancerAuthor Commented:
Thank you. So, I'm going to change it manually :) A bit annoying but not a tragedy :D
JohnBusiness Consultant (Owner)Commented:
Thanks. Yes an annoying thing but the lock screen code will likely change with Windows
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Windows 10

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