|Corded mice frequently develop broken wires inside the cord, often near where it enters the mouse, after the mouse has been used a lot, or at any time if the cord has been yanked on. If the insulation for the broken wire(s) is(are) intact, the connection of that(those) broken wire ends will be unreliable - sometimes the mouse will work fine, sometimes it won't. The cursor may jump all over the place, or move without you touching the mouse, or only move in some directions, or not move at all., etc., etc. Wiggling the cord near where it enters the mouse MAY make it work / not work, depending on the position of the cord. |
Try a different mouse !
If you have an older mouse that has a ball inside of it, remove the ball opening cover on the bottom of the mouse and clean the accumulated crap off of the three rollers !