I recently ran Malwarebytes Anti-Malware and lo and behold, it found h4x0r.dll in three different locations. Had it remove all three and magically the trainer started working. So if there is any chance that you ever downloaded a non Cheat Happens trainer you might want to download and run a full system scan
That's because h4x0r.dll is created to block the functionality of CH trainers. I would advise you against using them.
I downloaded the new DLC and all of a sudden the 1.02 trainer says that I do not have permission to use it and AVG thinks it's a virus.
Link
AVG is the worst anti-virus ever seen, get a decent one! I suggest Kaspersky or avast!
Actually, Avast! considers it a trojan, too. Had to exclude it.
I use Kaspersky and i have no problems made the trainer folder an excused file and everything runs great and have yet to have a virus eat up this comp...