By freezing do you mean that they totally stop and stay that way, or is it an intermitent thing like jerky movement?
If its intermitent, then something else that is running is stealing clock cycles and causing the problem. You might check for things like norton virus scanning etc. If it totally stops then we need to look at what video card you have and what drivers you are using.
Let us know and we will be glad to help, and Welcome to our Forum.
