PostgreSQL server event log is located in pg_log folder:
- Windows 32bit, PostgreSQL x86: C:\Program Files\PostgreSQL\<X>\data\pg_log
- Windows 64bit, PostgreSQL x64: C:\Program Files\PostgreSQL\<X>\data\pg_log
- Windows 64bit, PostgreSQL x86: C:\Program Files (x86)\PostgreSQL\<X>\data\pg_log