Windows Explorer (File Utility) Slows When Selecting a QuickTime File

Windows Explorer (the file utility, not the browser) slows and sometimes crashes whenever the right pane of Windows Explorer points at a QuickTime file. CPU activity increases substantially, with the process WLXQuickTimeControlHost.exe consuming over half of the CPU.
I tried uninstalling QuickTime and the problem disappears (but of course now I have no way of playing QuickTime files). I reinstalled the latest version of QuickTime (7.5) and the problem returned. I also have QuickTime Pro.
Anyone else see this behavior? Any troubleshooting ideas? I have McAfee Virus/Spyware/Firewall protection and the system appears clean.

The villan was Windows Live Photo Gallery which contains WLXQuickTimeControlHost.exe.
Removal of Windows Live Photo Gallery solved the problem.

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