When I click on the Mozilla Firefox icon on my desktop I get a message that says "The procedure entry point is Threaddesktopcomposited could not be located in the dynamic link library USER32.dll.

When I click on the Mozilla icon on my desktop, I get the error message "The procedure entry point is Threaddesktopcomposited could not be located in the dynamic link library USER32.dll.
== This happened ==
Every time Firefox opened
== I upgraded to the new version of firefox today (7/16/10)

This issue can be caused by a problem with the file c:\windows\system32\dwmapi.dll
The file dwmapi.dll is a Vista file and should not be present in Windows XP.
http://support.microsoft.com/kb/969155 - On a Windows XP-based computer with Family Safety installed, you receive an error message: “The procedure entry point IsThreadDesktopComposited could not be located in the dynamic link library USER32.dll”

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