Have a different error? Drop a comment on XDA Developers’ MTK section with your exact Device Manager error code and Windows 11 build number for community-driven support.

bcdedit /set testsigning on

In conclusion, installing the Mediatek Preloader USB VCOM Port Driver on Windows 11 64-bit is a straightforward process that requires careful attention to detail. By following the steps outlined in this article, you should be able to successfully install the driver and perform various tasks on your Mediatek-based Android device.

Windows 11 strictly blocks unsigned drivers by default. To bypass this for the VCOM driver, you must temporarily disable this security feature. Press to open Settings .