Created Unassigned: After Installing SP2013 with AutoSPInstaller Set-SPEnterpriseSearchFileFormat fails with The processing of files of type 'pdf' is already supported by the parsing system [21166]

After Installing SP2013 with AutoSPInstaller Set-SPEnterpriseSearchFileFormat fails with The processing of files of type 'pdf' is already supported by the parsing system.

Anybody got any ideas why this is happening ?

Regards

Nigel