I played some Pool on Pogo last night. I don't believe my mouse pointer froze at all. I don't understand why plugging it into a different USB port would make a difference but it did. Thanks for your help.
Richard,
It appears that the USB port on your computer that you first used has a hardware problem.
By plugging your mouse into a different USB port, you bypassed the hardware problem.
I would be cautious about inserting anything into that USB port (the one with the hardware problem). If you insert something into that port (say a flash drive), and the port is indeed bad, then it could corrupt whatever device that is inserted.
If you must use that USB port, then you may want to have your PC checked out by a competent repair shop (get references from friends before picking a shop).