Windows 10: My windows 10 lockscreen changing to default image when startup and showing the lockscreen,

My windows 10 lockscreen changing to default image when startup and show the lockscreen, but if i go to the lockscreen when i was on desktop and pressing Win + L, the lockscreen image change to the image that i set, i tried with my own solution like deleted the SystemData on C:\ProgramData\Microsoft\Windows\SystemData, and put with my lockscreen image, after that i restart my computer and check if the image was applied when startup and start showing on the lockscreen, and the result is nothing. i need help guys

:)

 

Windows 10 lockscreen image

my chosen back ground for Windows 10 lockscreen always reverts to a default image.

 

Lockscreen Refuses to Change

When I first installed Win 10, one of the first things I did was to set a new Lockscreen pic. I uses the lockscreen pic as the sign-in pic so I have that option ticked. A few days ago, though, I decided to change it, and it refuses to change. The sign-in is always the old lockscreen. I can select another picture and it accepts the picture, but when I go to the sign-in screen its always the original picture not the new one. I have tried different pics including some defaults from Microsoft but it always displays the original file. I tried disabling the "show lockscreen as sign-in" and that works, but once enabled it always shows the same pic. Anyone have any clue whats going on?

 

lockscreen images

When I first started using my laptop, it showed different types of images on my lockscreen. I liked as I get to see a new image every time. But my brother has set a stupid image as lockscreen image. Now I can do nothing but to settle with the images I have
in my laptop. Can anyone please help me with this.