• SQL server 2005 SP3 which you have as of now(9.00.4035.00 ) is out of support. So first thing you should do is apply SP4. Access violation exception generally means some bug in SQL Server and its best to get this stack dump analyzed by Microsoft Engineer. You might get lucky with debugger but you would not be able to draw correct inference from it.

    Even if you open case with MS they would first ask you to install latest SP and if the issue occurs then revert to them. So instead first apply SP4 and see if this issue subsides.

    You are also using Old Version of windows Server, windows server 2003 you should consider upgrading both SQL Server and windows Server to supported versions and editions.