Wandering Mouse Cursor
I've got the latest Intellimouse driver installed but on two different laptops the mouse cursor goes for an intermittent wander along the top of the screen (and occasionally to the bottom of the screen). It started happening about a month ago so I cannot (or haven't been yet able to) relate the fault to any Microsoft patch. I expect to find that it's related to a program that cuts in every so many clock cycles (may be Outlook checking the mailbox at the ISP, but System File check has achieved nought).
Anybody out there having the same problem (or any clues as to cause)? Both laptops have vaguely similar software on them. Op sys is XP Pro with SP2 and most MS updates.