How Can I Update the Driver and Firmware of My Kontrol S88 MK3 on Windows?

If you are having problems installing the latest firmware for your Kontrol S-Series S88 MK3 keyboard on a Windows computer, please follow these steps:

Click the Windows Start Button, type "updates" and hit enter.
Install all available Windows updates.
Close the Windows Updates window.
Download the KSMK3 Updater for Windows:
https://www.native-instruments.com/specials/komplete/kontrol-update/
Close your web browser and all other applications.
Use a USB-C power supply for the Power Only port, along with a USB-C cable connecting the keyboard’s HOST port to the computer (with USBC to A adapter if needed).
Turn the keyboard on.
Unzip the downloaded KSMK3 Updater file and run the extracted "Updater" application.
Click the Update button.
The update will fail:
Click the Windows Start Button, type "Device Manager" and hit enter.
In the Device Manager, expand Other devices.
Right-click KONTROL S88 MK3 DFU and select Update Driver.
Click Browse my computer for drivers:
Click Let me pick from a list of available drivers on my computer:
Select Show All Devices and click Next:
This will retrieve a list of all devices which may take a moment:
Select Native Instruments and Komplete Kontrol S88 MK3 DFU and click Next:
An Update Driver Warning appears. Accept with Yes:
The driver for the Komplete Kontrol S88 MK3 DFU is installed. Click Close:
The driver should now appear in Universal Serial Bus Devices:
In the KSMK3 Updater, click the Retry button:
This will start the firmware update process. The keyboard will be rebooted until the update is finished:
After the update, click Finish to close the Updater:

If you are still having issues, please read this article: Kontrol S-Series MK3: Troubleshooting Firmware Update Issues