"global/pg_control": Permission denied

Last night,

My desktop (acting as a db-server for my discipline's group) has it power cycled this morning at 4:10 (I am not sure
whattriggered the power cycle).  When the computer restarted itself PostgreSQL failed to start on its own.  I attempted
tostart it manually but encounter the following error.  If I need to, I can re-install postgres and restore a dump file
thatI took last night. But I would like to discover why this happened so that I can hopefully prevent it from
reoccurringin the future. 

...
C:\Program Files\PostgreSQL\8.2\bin>pg_ctl start -D ..\data
server starting

C:\Program Files\PostgreSQL\8.2\bin>2007-11-15 06:36:13 PANIC:  could not open control file "global/pg_control":
Permissiondenied 

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.
...

I don't know if this is related, but I also saw an error raised in the windows event viewer by Postgres when postgres
attemptedto restart itself after the power cycle: 

...
2007-11-15 06:26:26 FATAL:  invalid value for parameter "log_statement_stats": 1
...

Also right before the power cycled I saw this warning:

...
Windows saved user JEG\BroersR registry while an application or service was still using the registry during log off.
Thememory used by the user's registry has not been freed. The registry will be unloaded when it is no longer in use.  

 This is often caused by services running as a user account, try configuring the services to run in either the
LocalServiceor NetworkService account. 

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp
...

Regards, Richard Broersma Jr.