The wallpaper on my Dell laptop changes after I modify it

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I have a problem,I have Dell latitude E5410 windows 7 laptop,problem is in wallpaper changing.When I put some wallpaper I't works for couple minutes and than It just delete and my wallpaper is black.Please help me if you know the problem or solution.

1 reply

Are you using copyrighted materials?

How are you setting them? You aren't using some wallpaper program you downloaded for free are you?