The Akupo Monster

My friend asked me to fix her computer.  I generally like to take a look at people's computer problems and try to solve it, but I have never seen this problem before.  As you can see, the button where it would usually say "cancel" now displays a word in a foreign language.  My best guess is Greek.  If anyone could help me fix this problem, it would be much appreciated.

I forgot to mention that I ran an Avira AntiVir Personal virus scan on that computer and nothing malicious came up.