My mouse died on me (I checked batteries first).  Went to reinstall it (it is a Microsoft Laser wireless mouse).  I was required to restart my computer.  When I did, it took me to the page I need to log in with.  I put in my password, but neither my "enter" buttons work, so can't get into my laptop.  Have no idea what to do at this point.  I turned it off by holding in the power button, but when I restarted it, I have the same problem.