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Use the correct ODBC Data Source Administrator tool based on your application’s bitness: how to install postgresql odbc driver on windows
You must match the driver architecture with the application using it, not necessarily your Windows OS. Require the 32-bit (x86) ODBC driver. 64-bit Applications: Require the 64-bit (x64) ODBC driver. how to install postgresql odbc driver on windows
Navigate to the msi folder and download the latest .zip file for your architecture (usually x64 for 64-bit systems). Extract the .zip file and run the .msi installer. how to install postgresql odbc driver on windows
Complete Guide: How to Install PostgreSQL ODBC Driver on Windows
This is the most critical step. The bitness of the ODBC driver the bitness of the application that will use it.