I use a 3Dconnexion SpaceExplorer mouse and am having a problem with it.  It's been great for a few years but now, even with my hand off the control, my parts and assemblies won't stop rotating.  The speed of rotation increases as I increase the sensitivity of the mouse from the control panel.  I've installed the latest driver and that made no difference.  Ditto for re-booting.  No response so far from tech support at 3Dconnexions.  Other than a two-pound ball pein hammer, does anyone have any suggestions on what I should try next?