SOLUTION
https://community.avid.com/forums/t/97313.aspx
Hi,
did you install the core service from here?
C:Program FilesCommon FilesAvid
If this does not help, I would try to make a complete uninstall (think about backup) including all patches, digidesign audio drivers, sentinel protection.
AVID also suggest deleting all folders named “AVID” in c:program files and c:documents and settingsall usersdocuments
And the following regestry entries:
– HKEY_LOCAL_MACHINESOFTWAREavid
– HKEY_LOCAL_MACHINESOFTWAREAvid TechnologyAVX Plug-ins
reboot the system
Then try to install your 5.0.3 again, after that the patch you were running before (I´m happy with 5.0.3.7r).
Good luck!
Kristina