Uninstall Nero 7 installed on Windows 7

Recently I just bought a computer with Windows 7, not realizing the compatibly having Nero 7 with Win 7 install, now I can not uninstall it because the intern shows this error near the end:

- Internal error:

The DLL custom action was discontinued in the last call in function
'NeroAg_UnregisterComEx' Installer must leave now.

Interrupt thread ID 2864
Current thread ID 3752 -

Now how can I uninstall it completely because you buy Nero 2014

Thank you
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