Skyrim, very great damage. (The Elder Scrolls 5: Skyrim)

Playing Skyrim for many, has circulated the destruction completely and suddenly see that my damage is very high, any dragon with a single blow and stand the giants. Why this is so and how to remove it without losing the passed? You play a mage. The steam version of the game. And huge damage on all the weapons and all enchanted spells destruction.
To remove via the console tried nothing came of it.
Please help.)