Microsoft Office costs mega-bucks!
The most popular free alternative is Apache OpenOffice (which is used by many schools, police forces and other public bodies wishing to avoid adding to Bill Gates' fortune):
http://www.openoffice.org/
However LibreOffice also has an increasing number of fans. It's based upon the source code for Lotus software, which used to be the main commercial rival to Microsoft Office. When the company behind it withdrew from the commercial market, they placed the source code in the public domain:
https://www.libreoffice.org/
The other big freebie is Kingsoft Office Suite Free 2013, which has an excellent review in the current issue of 'Computer Act!ve' magazine:
http://www.ksosoft.com/product/office-free.html
(NB: If you download that suite of programs, take care to de-select any offers of additional unwanted software).
If you
only want a word processor (rather than a full office suite), Abiword might be best for you:
http://www.abisource.com/
Whichever program you choose, take care when using the 'Save' option, as most programs automatically save in their own format, rather than in Microsoft Word format. (If you use the wrong format, people who receive your CV won't be able to view it in Microsoft Word). The trick is to select 'Save As' (rather than just 'Save') and select the Microsoft Word format. Alternatively, in OpenOffice, you can change the default 'Save' format to Microsoft Word:
http://voices.yahoo.com/how-set-openoffice-writer-save-as-microsoft-11017880.html
Chris