: Go to Start > Control Panel > Administrative Tools > Data Sources (ODBC) .
I reinstalled the latest psqlodbc_09_03_0300-x86.msi (32-bit driver). No change. I downgraded to version 9.2 — still failed. Then I noticed something odd: The driver’s configuration dialog had a checkbox labeled — but the value kept resetting to unchecked after saving. postgresql odbc driver windows 7 32 bit