The Age of Empires II: The Age of Kings Update 2.0a features many updates and fixes, including the AI update, town center changes, improved performance of single player campaign games, and improved overall stability.

When running a restricted user account with fast user switching under Windows XP, some games will not start correctly. The game requests that the original disk be placed in the drive, even if it is already present. To remedy this issue, download and run this fix.

The Age of Empires II: The Conquerors update v1.0c includes several game enhancements and fixes. The v1.0c update includes all of the fixes and content of the previous 1.0b update.

This update addresses the issue where the computer player resigns after a few minutes of play. It does not affect multiplayer, meaning players with the update can play with players who do not have the update. It is localized into English, French, German, Spanish, and Italian all in the same build.