Patch 1.0c is a patch in Age of Empires II: The Conquerors. It fixed various bugs and security issues (mostly related to the proliferation of trainers in 1.0b and a "map hack"). It was released on August 15, 2001 for the English version; August 22, 2001 for European localizations, and August 26, 2001 for the Japanese version.[1]
Patch 1.0c was the patch used for more than a decade across different multiplayer platforms, starting in the Microsoft's MSN Gaming Zone and through International Gaming Zone (IGZ), GamePark and Voobly.