An ink-enabled application hangs when you try to add input to the application by using a tablet pen on a Windows Vista Tablet PC-based computer
On a computer that is running Windows Vista Tablet PC, when you try to add input to an ink-enabled application by using the tablet pen, you notice that the application crashes. When this problem occurs, you must end the application process in Task Manager.
This problem usually occurs on computers that have a dual core processor or a multiprocessor.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB971252.