Windows 10 can't change logon screen in both version 1709 and 1803

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Hi,

I haven't been able to change my logon screen since I got this Windows from a custom build gaming PC.

I have tried everything.

I have succeeded deleting the logon image from: "C:\Windows\Web\Wallpaper" and "C:\ProgramData\Microsoft\Windows\SystemData"

Before I deleted it, the image being used as logon screen did not appear from: "Settings>Personalization"

Regedit keys where logon image should be found online does not exist on my PC.

I have changed my lockscreen and set it to, free translation: "Show lockscreen background image on logonscreen".


Any help to make me change logon screen image will be greatly appreciated!

All regedit paths or any other hack are more than welcome.

Thanks

Ben