Constant update notifications

[MWulfe]

I am getting frequent notifications to update my Windows desktop Dropbox app, requesting permission to make changes to my system.  It doesn't matter whether I respond yes or no, nothing happens after that.  It just keeps happening over and over again.

[wiringharness]

I've been having this problem too for a couple of weeks, so I tried reinstalling and so far so good.  I'll report back if it happens again.