word update stuck
The MS Word update got stuck. I went to one of microsoft mac help communities online. The suggestion was to log off and then log on holding down the "shift" key, which I did. A gray screen appeared with only a white box stating "installing software update" and audio saying that I should not shut down until the install has completed. It's now been 3 hours. I see a couple of different suggestions online, but not sure the most appropriate. Any help would be gratefully appreciated.
iMac (24-inch Early 2009), OS X Mavericks (10.9.5)