Microsoft has already released Windows 10 October 2018 Update (1809 version), but errors continue to occur. For example, there have been reports of disabling the operating system.
Yes after installing Windows 10 October 2018 Update (1809 version) on computers running the operating system, the Windows watermark appears on the desktop. The watermark only appears on non-enabled Windows.
Of course the event brings too many problems for users of the operating system that no longer have the key product for their system. Another problem is that they can not find their key with a third party application because their system is not enabled.
The only solution is to go back to the previous version of Windows 10, using the "roll-back" function and then find the product key to reinstall the Windows 10 October 2018 Update.