The Patches Scrolls website. Their file Medieval_II_Total_War_Kingdoms_1.5_Patch.exe has a SHA-1 checksum of ec7d6c8ec9e6c8d0c0f2f... (verify it with any checksum tool).
If you are running a retail disc version, follow these exact steps to ensure a verified, error-free installation. Prerequisites: The 1.3 Baseline medieval total war 2 15 patch verified
The original 2006 release suffered from memory leaks, causing crashes after 2+ hour battles. The 1.5 patch introduces better Large Address Awareness (LAA) potential, allowing the game to use up to 4GB of RAM on 64-bit systems. The Patches Scrolls website
I can provide the exact step-by-step installation guide for your setup. medieval total war 2 15 patch verified