This is a new trainer template. Disable antivirus and other security software.
Dont use any of that crap.So that wouldn't be an issue..
Unlimited health only seems to work in the "Bad Dream" difficulty, not Nightmare or Insanity, other options appear to work as intended.
(Not a huge problem but worth mentioning, perhaps this is why some of the previous posters said the trainer is not working?)
Thats what I thought too at first then I just realised that on Bad Dream difficulty it takes a good 3 or 4 bites from the first spider baddy to reduce your life by one flame.
As to the other two options, much like the health, even with my antivirus disabled it still results in 0 effect.
Steam, Vista, etc etc.