Ok, so this was annoying the heck out of me. I love Windows Live Photo Gallery, but it installs with support for Quicktime. Its Quicktime support is provided via a process called WLXQuickTimeControlHost.exe. Unfortunately, whenever you open a folder that contains any Quicktime-associated files, the Quicktime support process uses 100% of one of your processors! Well that SUCKS!
Well, I found the solution today… Microsoft Knowledge Base Article 944563, which disables support for Quicktime in Windows Live Photo gallery. Fine by me – I can use Windows Media Player or Quicktime itself to view the MOV and MPEG-4 files.
Here’s the link: