It would appear the latest update is broken. After investigating I released that the installer didn't ask for a key code nor did it install punkbuster. I copied the 2.52 installer from my PC to hers and it installed just fine.
Edit: Well I lied, the installer did its thing, installed fine, asked for a key code, installed punkbuster, updated to 2.53, click play, get a black screen and COD again.