Installer Information – Error 1402. Could not open key:

Hi guys,
I received an error message when I wanted to install Inventor 2012 Sp1.
I use Windows XP 32 bit. I have no idea why I received the error message. Have you any idea of the error message?
Please help.

Installer Information
Error 1402. Could not open key:
HKEY_LOCAL_MACHINESoftwareAutodeskRegistryVerison16.0. Verify that you have sufficient access to that key, or contact your support personnel.
