With "Microsoft Home Use Program" you can have genuine Office 2013 for just ~9$
www.microsofthup.com/hupus/chooser.aspx?culture=en-US

Some universities sell softwares by their IT ; but If yours don't or more expensive than this offer, Home Use Program sounds cool especially for people that want keep budget.

Unfortunately, my university is not one of affiliated so I can't buy for cheap. If someone who has chance to but doesn't think to buy share his/her "Program Code" via PM, I will be grateful.

I checked and I don't qualify either! :( Would be grateful if someone shared (if it's acceptable)

If it's just for writing your dissertation, LaTeX is even cheaper (it's free).

To write without styles, LaTeX is great solution but MS Office is still (almost) gold standard for writing. I have never heard an instititue that accepts dissertation report in TeX format. LibreOffice has compatibility problems. As result, MS Office for ~9$ is slightly expensive than free :)