: Enter your serial number in the "Serial Numbers" section of the ControlCenter. Most retail versions were automatically registered if bought through the Nero Website , while boxed versions required manual entry. Blacklisting

: If the software was previously activated on your PC, you can manually find the key by opening regedit and navigating to: HKEY_LOCAL_MACHINE -> SOFTWARE -> AHEAD -> NERO BURNING ROM -> INFO . Updating Your Version

If you installed Nero 6.0.0.11 using a valid key, and then try to update to 6.0.0.23, you would assume the same key works. And it should — but many updaters were designed to validate against a database of "paid upgrade" keys. Some users found that after updating to 023, Nero suddenly demanded re-activation. This is because build 023 patched the license checking mechanism to block earlier cracks.