how can I add the Tablet PC accessories?

Windows 7 is running fine on my laptop, but the Tablet PC folder (in the Accessories folder) is empty. I'd like to be able to use (especially) the Math Input Panel. I haven't been able to figure out how to add it. Thanks.

Never mind -- I figured out how to do it. In case anyone wants to know: "Programs and Features," click "Turn Windows features on or off" in the upper left, and Tablet PC appears as an option.