Clear your Xbox 360 hard drive's cache
In the Xbox 360 dashboard, select "memory" in the system blade and highlight your Xbox 360 hard drive. Now press: [Y], [X], [X], [Left Bumper], [Right Bumper], [X], [X]. You should recieve a message that says, "This will perform maintenance on your Xbox 360 storage devices. Do you want to continue?" If you click yes, your Xbox 360 will clear it's hard drive cache. If you click no, you'll be returned back to your dashboard menu. This will help your Xbox 360 run a tad faster and fix freezing issues.