In Word, Hotmail, etc., my cursor skips backward to previous lines, or skips to the left in the same line. It does this in the middle of words, as I am typing. It even did it as I was typing this message. Very annoying.

I found a previous thread that suggested there may be a compatibility issue between my wheel mouse and my touchpad, and it suggested turning off the touchpad on my laptop. But I can't figure out how to turn off the touchpad in Windows 7--there doesn't appear to be an option for doing this in Control Panel Device Manager.