Windows 7 Media Center include an Optimization feature that will optimize media to work with WMC. The process can take a long time if you have a large library and here we look at how to schedule it to occur while you’re sleeping.
Optimization is an included feature that will organize your media files to work more fluidly with Media Center. It performs optimization tasks like re-indexing your media for faster retrieval of your media. It also restarts the Media Center services to clean up errors.
To access the Optimization feature, launch WMC and from the main menu navigate to Tasks then Settings.