In Windows 11 (24H2 or later), the new Windows MIDI Service may be enabled through a recent Windows Update. This Windows MIDI Service provides comprehensive support for MIDI 1.0 and MIDI 2.0, as well as other convenient features and performance improvements.

By using this Windows MIDI Service, it is possible to use functions that were not supported by the previous standard Windows driver, such as sharing MIDI ports between multiple applications (multi-client function) and sending and receiving long System Exclusive messages. To provide these features, KORG has released KORG USB-MIDI Driver.　
However, due to compatibility issues, the Windows MIDI Service cannot work properly in environments where the KORG USB-MIDI Driver is installed.

Therefore, if you are using KORG products with the KORG USB-MIDI Driver on Windows 11, please follow the steps below to uninstall it and use the Windows MIDI Service.

Please try this method if you are unable to use your KORG product after a recent Windows update.

Applicable Windows 11 system versions:
24H2 or later (25H2, 26H1 included)
Windows Update, which includes the Windows MIDI Service, began around the end of January 2026.

How to uninstall KORG USB-MIDI Driver：
1. Right-click the Windows Start button and select "Installed apps" from the menu that appears.
2. Find “KORG USB-MIDI Driver Tools for Windows” in the apps list and uninstall it using the “More Options” button on the right.
3. Disconnect all KORG products connected via USB.
4. Right-click the Windows Start button and select "Device Manager" from the menu.
5. Enable "Show hidden devices" from the "View" menu.
6. Click "Sound, video and game controllers" in the list of devices that appears, then right-click the KORG device name that appears.
7. Choose "Uninstall device" from the menu that appears.
8. If there is a check box “Attempt to remove the driver for this device” in the dialog box that appears, check it.
9. Click “Uninstall”.
10. Repeat steps 6 to 9 for all KORG products displayed in 6.
11. Restart your PC.
 

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Cautions:
- If you reinstall or use the KORG USB-MIDI Driver (including “MIDI Driver Uninstall Utility”), the Windows MIDI Service may no longer function correctly.

- When using Windows MIDI Service, the MIDI port names displayed in applications may differ from those when using the KORG USB-MIDI Driver.

- When using the dedicated editor or system updater for some KORG products, you may be recommended or prompted to use the KORG USB-MIDI Driver. Please ignore or do not select this option.

- Future Windows Updates may improve functionality and fix problems. Please make sure you have the latest Windows Updates installed.

For more information about the Windows MIDI Service, please see the following articles published by Microsoft:
Overview: Here (Windows Blogs)
Information on currently reported known issues and solutions: Here (Dev Blogs)