Problems with software update!

When I try and update office software, terminal bash opens up & update doesn't work and is still there when i search for updates the next time. I havent been able to update for the last couple of months.

Previously when I would update and it had finished downloading, a login box would come up, I would put in my password and it would be fine. Now, a terminal pop up comes up that says:

Anna-Georgiadiss-MacBook-Pro:16807Office 2008 12.3.2 Update.mpkg annageorgiadis$

It also says:

16807Office 2008 12.3.2 Update - bash - 80x24

I dont even know what terminal is or how to use it.

Can anyone tell me why this is happening and how I can fix it?