For a very long time, NAV2009 and even 2010 has interfered with my mouse (at random times, seemingly about once an hour, my mouse balks at being controlled, even reappearing in other places on the screen when I'm trying to regain control over it, but the second I unplug the ethermet cable, all's fine with my wired mouse), and this annoying behaviour persists even after I've disabled NAV's incessant automatic and pulse updates (which I suspect is the root cause for the mouse issues). The only thing I haven't tried is setting NAV to silent running. And yes, I've tried reinstalled NAV, even upgrading, but it seems if NAV doesn't 'fall apart' (requiring uninstalls and re-installs), then the 'darned' thing simpky finds some other way to annoy me. Good AV, best I can find, but annoying in some respects, ie; little to no real tech support and it's bugginesses.
[edit: changed subject to reflect moved post to new thread]