Well maybe not HUGE but inconvenient. Changed batteries in my usb wireless mouse. Logitech brand. Now the skroll (right spelling and terminology??) doesn't work. The cursor moves but does not move page up and down, can go to the extreme side and move that way. Anybody help the helpless? I did go to mouse settings but no luck. Thank you. Edit to Add: A mouse on a cord works correctly, but don't want to use it.