This feature usually applies to your units and buildings. Instead of losing health when attacked, your units stay at 100% health. This makes your army invincible, allowing a single Conscript to destroy an enemy base if you have enough patience.
In older trainers, using the Weather Storm Device or Nuclear Missile would cause a "recharge" visual bug. The Fixed version resets the timer properly, allowing you to rain down destruction every 5 seconds. Red Alert 2 Yuri--39-s Revenge Trainer 1.001 54 Fixed