Symptoms

Unable to register an Oracle service instance:

Error "VALIDATION The type initializer for Oracle.DataAccess.Client.OracleConnection threw an exception"
 

Diagnoses

Error on the host server log:

10702 An error occurred in the Oracle Service Instance. System.TypeInitializationException: The type initializer for 'Oracle.DataAccess.Client.OracleConnection' threw an exception. ---andgt System.DllNotFoundException: Unable to load DLL 'OraOps12.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)
 

Resolution

Resolved by installing the C++ redistributable package 2010.