I´ve tried every AV Program, from AVG to Zonealarm, but non of them worked so nice with CH trainer´s as AVIRA free.
Sure it detects the trainer as virus but you only have to click on details when the massage appears and choose the scan option always ignore, then you can use the trainer without problems or massages!
The Program is slow simple and mainstream but it works great!
I assume you have not tested Paid ones? Because usually the free versions of most AVs are pretty crap because they are free.
The way trainer works there is always a chance that on next update the trainers get flagged, especially when they have no digital signature. I made good experience with Avira, MSE, AVG, GData. But like I said just grab one that respects your decision and that you personal like.
* Updated game trainers and cheats daily
* Get notified when new cheats are added
* Request which games get new trainers
* Priority support with any problem