frankv: Libre Office

I got burned by one of these fake key sellers, and tried out some of those "office alternatives" (libreoffice, openoffice, kingsoft office).

None of them work properly for complex word documents, powerpoint, and forget about Access files.

Waste of time if you need 100% office compatibility or want to do complex things IMO.

Eventually found a copy of 2010 Pro Retail (FPP - full packaged product ie boxed) on TM - that is the one that allows 2 installs. The PKC (product key card) version (get a key and download) is one copy only.

Office 2010 is about as good as it gets, and will probably still be in use a decade from now. MS knows this and wants you to keep paying them money, hence office 365.

Check out this and this or just google it 

Hope this is helpful.