Windows 7 is no longer supported by Microsoft, but many legacy systems still run on it. The latest PostgreSQL ODBC drivers (e.g., psqlODBC 13+) may on Windows 7 due to missing API dependencies (e.g., GetSystemTimePreciseAsFileTime ).
If the driver fails to install or load, it might be missing the Microsoft Visual C++ Redistributables. Since Windows 7 is old, it might lack the VC++ 2015-2022 redistributables required by modern drivers. Download and install the latest from Microsoft (ensure you get the version matching your driver: x86 or x64). odbc driver for postgresql for windows 7
If you receive SSL errors, you may need to disable SSL in the DSN configuration if your server does not support it, or ensure your PostgreSQL server has valid SSL certificates. Windows 7 is no longer supported by Microsoft,