Thank you! I did the first three things exactly -- the same. I could move the cursor but couldn't click on my account icon -- I then hooked up my desktop mouse and still the same outcome. I read where you written it was the wireless in your bag and just remembered mine was in my computer bag -- and I left it on. Thanks again for this post.
Thank you SO MUCH for this.... I had the issue as well, and thought "what are the odds, no way, too easy". Lo and behold, I went into my office (three rooms away, mind you) and my wireless trackpad (which I previously thought was dead) was hidden under a stack of magazines and being pressed.
Gotta love community info sharing!