PostgreSQL on Windows fails to start - 'could not create shared memory segment' PostgreSQL 9.4 &amp; 9.5 (beta) on my Windows 7 laptop fails to start. In the Windows event log I see the following error:


  2015-11-10 13:53:49 IST FATAL:  could not create shared memory segment   "Global/PostgreSQL.851401618": Permission denied


It was working before for a long time, and suddenly it stopped.

I tried to uninstall and install, without any luck.

dynamic_shared_memory_type is set to windows.
Community Wiki answer generated from question comments by a_horse_with_no_name

Try setting dynamic_shared_memory_type = none in postgresql.conf.

"Permission denied" seems to indicate that the permissions for the user under which the service runs have been changed.