What are WON.MID Error Messages?

General WON.MID Runtime Errors

WON.MID file errors often occur during the startup phase of Age of Empires II, but can also occur while the program is running. These types MID errors are also known as “runtime errors” because they occur while Age of Empires II is running. Here are some of the most common WON.MID runtime errors:

• WON.MID could not be found.
• WON.MID error.
• WON.MID failed to load.
• Error loading WON.MID.
• Failed to register WON.MID / Cannot register WON.MID.
• Runtime Error - WON.MID.
• The file WON.MID is missing or corrupt.

Most MID errors are due to missing or corrupt files. Your WON.MID file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Age of Empires II), or deleted by a malware infection. Furthermore, WON.MID file corruption could be caused from a power outage when loading Age of Empires II, system crash while loading or saving WON.MID, bad sectors on your storage media (usually your primary hard drive), or malware infection. Thus, it’s critical to make sure your anti-virus is kept up-to-date and scanning regularly.

How to Fix WON.MID Errors in 3 Steps (Time to complete: ~5-15 minutes)

If you're encountering one of the error messages above, follow these troubleshooting steps to resolve your WON.MID issue. These troubleshooting steps are listed in the recommended order of execution.

To begin System Restore (Windows XP, Vista, 7, 8, and 10):

1. Hit the Windows Start button
2. When you see the search box, type "System Restore" and press "ENTER".
3. In the search results, find and click System Restore.
4. Please enter the administrator password (if applicable / prompted).
5. Follow the steps in the System Restore Wizard to choose a relevant restore point.
6. Restore your computer to that backup image.

If the Step 1 fails to resolve the WON.MID error, please proceed to the Step 2 below.

You can uninstall Age of Empires II software by following these instructions (Windows XP, Vista, 7, 8, and 10):

1. Hit the Windows Start button
2. In the search box, type "Uninstall" and press "ENTER".
3. In the search results, find and click "Add or Remove Programs"
4. Find the entry for Age of Empires II (not specified) and click "Uninstall"
5. Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall Age of Empires II software.

If this Step 2 fails as well, please proceed to the Step 3 below.

Age of Empires II (not specified)

Ensemble Studios

When the first two steps haven't solved your issue, it might be a good idea to run Windows Update. Many WON.MID error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

1. Hit the Windows Start button
2. In the search box, type "Update" and press "ENTER".
3. In the Windows Update dialog box, click "Check for Updates" (or similar button depending on your Windows version)
4. If updates are available for download, click "Install Updates".
5. After the update is completed, restart your PC.

If Windows Update failed to resolve the WON.MID error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.

If Those Steps Fail: Download and Replace Your WON.MID File (Caution: Advanced)

If none of the previous three troubleshooting steps have resolved your issue, you can try a more aggressive approach (Note: Not recommended for amateur PC users) by downloading and replacing your appropriate WON.MID file version. We maintain a comprehensive database of 100% malware-free WON.MID files for every applicable version of Age of Empires II. Please follow the steps below to download and properly replace you file:

1. Locate your Windows operating system version in the list of below "Download WON.MID Files".
2. Click the appropriate "Download Now" button and download your Windows file version.
3. Copy this file to the appropriate Age of Empires II folder location:
   
   Windows 10: C:\Program Files (x86)\Microsoft Games\Age of Empires II The Conquerors Expansion Trial\Sound\Midi\
   Windows 10: C:\Program Files (x86)\Microsoft Games\Age of Empires\sound\
   
4. Restart your computer.

If this final step has failed and you're still encountering the error, you're only remaining option is to do a clean installation of Windows 10.

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