Hello, I have PostgreSQL 10.5 (x64) running on Windows 10 (x64) installed from EnterpriseDB setup. I changed complete ownership of my drive E: including all sub directories and files due to some permission problems on it. There are no OS files installed in drive E:. However, PostgreSQL data files are in that drive and PostgreSQL failed to start after that permission change. I get following two errors at startup in Windows Event Viewer: Postgres: could not Access directory "E:\PostgreSQL_DATA": No such file or directory Run initdb or pg_basebackup to initialize a PostgreSQL data directory. I tried to set ownership of that directory to NETWORK SERVICE that did not help. Is there a way to fix that problem? Thanks & regards, Ertan Küçükoğlu