Hi, I had the same problem as everyone on this thread re. MP600 software and drivers.
I’m French-Canadian, so I went to the European Canon website and chose France in order to download the MP600 software, and drivers. I then chose English Canada to download them to my Operating system Windows 8.1 (x64).
I’m really making this EASY for everyone because, Instead of going through the steps I did, AFTER my downloads were done, I went back to the Europe website and found the UK site which is in English for those who only speak one language. Prior to downloading you will be able to choose any country and language you want. Follow this link: http://www.canon.co.uk/Support/Consumer\_Products/products/Fax\_\_Multifunctionals/InkJet/PIXMA\_MP\_series/PIXMA\_MP600.aspx?type=download&language=EN&os=
I hope this will resolve this issue for everyone :)