Windows 7 X64 Odbc -

Driver=SQL Server Native Client 11.0;Server=myserver;Database=mydb;Trusted_Connection=yes;

reg query "HKEY_LOCAL_MACHINE\SOFTWARE\ODBC\ODBCINST.INI\ODBC Drivers" windows 7 x64 odbc

Understanding the 32-bit vs 64-bit Issue The most critical thing to know about ODBC on Windows 7 x64 is that you have two separate ODBC administrators : Driver=SQL Server Native Client 11