of mouse? Optical or does it have a ball. If it has a ball, take it out and clean the crud off all the rollers.
a problem i have is that once in awhile my mouse pointer jumpes to a different spot. while that is not so bad once in a while my mouse seems to float to the start menu and all sorts of processes seem to start up and close. i have to wait till it gets to a stopping point and close the windows that were opened and even have to restart my computer. i am using windows xp w/service pack 2. any suggestions