I have Windows 7 and had difficulty typing without my cursor moving all over. I didn't have trouble while using computers with Windows XP or Windows 8, so I believe it was the way I typed or me accidentally hitting the keypad. Having played around with the pointer options in the Control Panel and unchecking "Hide pointer while typing" as well as slowing down the cursor speed, I still had trouble. So, I downloaded TouchFreeze.
I love being able to type without the cursor moving all over so I insert letters in the correct place in a sentence to get it somewhat coherent, but now I am discovering a problem to enlarge and reduce typing while I am reading articles on the Internet. Could this have anything to do with using TouchFreeze? I'm able to use the TouchPad to scroll with, though, so I'm not exactly sure what is going on.