Excel 2013- Only ANSI character set available when importing data


We've been scratching our heads regarding this weird problem:

We are trying to import data into excel that requires the UTF8 character set. When we load the file in excel the drop down list only shows one character set (ANSI). This happens on one laptop so I know it's something to do with the laptops setup.

We've tried:
-Loading extra character sets into Windows 8.1 (The OS on the laptop)
-Searching Google
-Re-installing Office from scratch (de-installing first of course)

Has anybody got any idea where the character set options in the file origin part of a text data import come from and how to add more?