Here's a site with loads of helpful suggestions: Link Removed - Invalid URL On the "CNET SEARCH" type in "CURSOR JUMPS AROUND" or "CURSOR JUMPING AROUND" It will bring up 111 posts under office and productivity- on this subject. Dates 1-9-07 through 1-25-07. Some people have tried reformatting, changing drivers for their mouse (PS/2 Wheel Mouse) -bad problem with that kind of mouse, HP had a suggestion. You'll have to read through it...