What happens when you try to start the service?
Have you searched for the postmaster.pid file?
If it still won't start..
WhiteRider wrote:Please select the last few files in C:\Program Files\PostgreSQL\8.3\data\pg_log (they're dated so just pick the recent ones), right-click and choose 'Send To Compressed/zipped Folder', then attach the zip file to a ticket on the Support system, and link to this thread in the reference field of the ticket so that we can investigate.