If COSTAR wont start on the Main Computer;
1/. Right Click in the bottom Toolbar and select Task manager
2/. Click on the Services Tab.
3/. Click on Open Services at the bottom of the page.
4/. Scroll down the list to SQL SERVER (MSSQLSERVER). It should have a status of Running.
5/. If not running, right click on the name (SQL SERVER (MSSQLSRVER) and select Start.
It will take a few minutes for the service to get to full speed but COSTAR should be fine now.
If you have any queries regarding Starting MSSQL in COSTAR, please contact the Support Desk.