Comentário oficial
Hi Marcus Müller,
Sorry to hear about these issues.
DDJ-RB cannot be updated because you have not updated Windows or you failed windows update. Windows will have the Pioneer DJ authentication if you update your Windows.
Will you please click Windows Update from Start menu to update Windows?
This is the only solution to install the DDJ-RB driver.
If your problem still exists, please file a support inquiry here.
Our rekordbox team will be happy to assist you.