• An error log should be created each time it tries to start, any further info in those?

    check out application view in eventvwr as well.

    sounds like it might not be able to find the sqlervr.exe. which should be in

    C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\binn

    is it there?

    which file does the services applet for mssqlserver say it is trying to execute, and is it present?

    ---------------------------------------------------------------------