Omega users who have not received the update, please read below. Support link provided.

Invitations are not given via the forums and are not a guarantee you will be accepted into the program.

You can try posting here to see if anyone will invite you -
forums.xbox.com/.../1994482.aspx

Hey Cleanable,

you didn't mention you had received a service message, in which case you will need to post in the Registration Support forum in order for the preview team to sort you out. Read below before you click!

Before that link works the main forum support team will - when they spot this message - verify you are in the preview program and grant you access to the preview areas of the forums. Once that is done the above link will work.

Please keep an eye on this thread as they will post here once they have updated your access.

I would best recommend using the link below. It will provide the needed support for that error you are receiving.

https://support.xbox.com/en-US/browse/xbox-360

Hi

If none of the support steps in the two links you have provided has helped if may be worth downloading and running the Windows 10 Update Assistant by using the Update now in the link provided below to ensure your version of Windows 10 is fully up to date.

https://www.microsoft.com/en-us/software-download/windows10

Please make sure you are following the instructions provided in the link below according to the console you are using.

The link: Perform an offline system update | Xbox Support

If the issue persists it would be best to het in touch with the online support for further assistance through Contact us | Xbox Support.