New versions of Windows 10 are incompatible with some Realtek Bluetooth drivers. Microsoft published a support article about this issue.

Symptoms

If you are trying to update to the Windows 10 November 2019 Update (Windows 10, version 1909), the Windows 10 May 2019 Feature Update (Windows 10, version 1903), or the Windows 10 October 2018 Update (Windows 10, version 1809), you may encounter an update compatibility hold and receive the message, "Realtek Bluetooth: Your PC has a driver or service that isn't ready for this version of windows 10. A new version is available."

Cause

Microsoft has identified compatibility issues with some driver versions for Bluetooth radios made by Realtek. You will need to update to driver version 1.5.1012 or later to remove this safeguard hold. Any earlier version of the driver is affected by this issue.

To safeguard your update experience, we have applied a compatibility hold on devices with affected driver versions for Realtek Bluetooth radios from installing Windows 10, version 1909 or Windows 10, version 1903 until the driver has been updated.