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Windows XP SP 2

When my computer is locked, the wallpaper displayed on it is the previous one that I had put on there, but when it's not locked, the wallpaper goes back to my current one. How can I fix it so that it will display my current wallpaper when locked?

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2 Answers 2

up vote 9 down vote accepted

This Microsoft Support article describes the problem ("This behavior is by design")
Previous Bitmap Image Displayed When Computer Is Locked
Read this article to understand how this problem occurs (normally when one was a bmp and the other a jpeg).

The solution given is as follows:

To prevent this behavior from occurring, clear the previous wallpaper by clicking None in the Select a background picture or HTML document as wallpaper box, and then clicking Apply. Then, select the Active Desktop image you want to use. When the computer is locked, the computer will display the background color and no previous images.

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1  
Ah good thinking, hadn't thought about the way Windows XP sets a JPEG desktop background. –  Richard Slater Oct 30 '09 at 19:01
    
Ok, I did that, but now how do I get it to display my current BG? –  wahle509 Oct 30 '09 at 19:03
1  
Apparently, you must set it again. –  harrymc Oct 30 '09 at 20:07
    
This problem only happened to me when I set my wallpaper to a PNG. I converted to a JPG and now all is well. –  mgroves Nov 13 '09 at 15:58
1  
Conclusion: It seems like Microsoft's implementation of PNG is to avoided. –  harrymc Nov 13 '09 at 19:41

I suspect that sometime in the past you have used a utility to copy your user account wallpaper settings to the "Default" Login/Lock account. You can use TweakUI to do this again. You can also make these changes directly in the registry at the following key.

HKEY_USERS\.DEFAULT\Control Panel\Desktop
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Is there any other way? This is happening on my work computer and I'm not allowed to install most applications or make registry changes. –  wahle509 Oct 30 '09 at 18:49

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