You can protect the server from a crashing application by running the Web applications in their own memory space. To configure IIS to do this, launch the Internet Service Manager from the Microsoft Internet Information Server menu under Windows NT 4.0 Option Pack. Open the node for the Web server and select the application to be modified. Right click the application node and select Properties from the pop-up menu. Check the Run in separate memory space checkbox, and click OK. This will cause any objects that the application uses to be run in their own memory space, and thus prevent an application error from bringing down the Web server, or any other part of the system.