The MS Office that you have is 60 day trial version that comes with advertisements and 500gb is more than enough for most people. The only way to fill up 500gb is with lots of DVDs ripped onto the hard drive at 4.3gb per movie. Though Blue Ray movies take up 23gb which I never put on my hard drive. Someone who makes lots of home movies can fill up 500gb.
Word on Office 2000 works good enuff on 64bit (such as Windows 7) systems and can be found on torrent sites
Visually Windows 7 is the way to go...over Windows 8
Oh, I paid good coin for the Office 2013 with Word and also for Acrobat. This baby is loaded. Can’t figure out a lot of stuff yet, I was used to my faithful old XP. It just got too full, and MS wasn’t supporting XP much anymore, trying to push us onto newer products. The last few months, every time you would turn it off, it would have to install a few updates for about ten minutes each time.