Hello,
CBTs were designed having MS' IE design.
If for some reason your current CBT stops working (sound issues, graphics etc) I have found a solution. Search for youtube as to how to downgrade the current version of IE. That is found in Windows Update's History. Disable automatic updates otherwise it will update IE again to the latest version. I've got CBTs by Boeing and Airbus and they do work only under IE version 9. Current IE version is 11. That is under Win 7 64 bits. Other Windows versions I cannot say since I only use Win 7 64. Give it a try. It is much easier than downgrading the whole system to Win XP.
You can start here:
https://www.youtube.com/watch?v=PvZhyuorakU
If you have Internet explorer version 11 you must keep downgrading from 11 until you reach version nine. You must then repeat the same process of downgrading more than once.
Cheers!
