You want to block USMT migration of Wallpaper and Themes from a Windows Vista or Windows 7 source computer. XP is not relevant as USMT already blocks wallpaper migration in that OS.

Sample 1 (using CONFIG.XML)

<component displayname="Microsoft-Windows-themeui" migrate="no"

Sample 2 (using custom XML)

<?xml version="1.0" encoding="UTF-8"?>
<migration urlid="">
<component type="Documents" context="User">
<role role="Data">
     <!-- Blocks wallpaper and themes (which include wallpaper) from migrating from Vista/7 -->
     <pattern type="Registry">HKCU\Control Panel\Desktop [WallPaper]</pattern>
     <pattern type="Registry">HKCU\Software\Microsoft\Windows\CurrentVersion\Themes\* [*]</pattern>

Further Notes

  • Ordinarily, modification of CONFIG.XML is discouraged. In this case, though, its manifest is atomic to wallpaper and themes alone. 

  • For more information on CONFIG.XML, examine:

  • USMT custom samples are always provided AS-IS and are not supported by Microsoft except through "best effort."