Before you install Trailhead, the following must be installed on the Trailhead machine:
Windows NT 4.0 Option Pack
Java Development Kit (JDK) 1.1.8
When you install Windows 4.0 Option pack, you must ensure that the Scripting Host component is installed. The following screen illustrates where, in the IIS install, you specify this installation:
To verify that IIS is installed properly:
Go to: Start->Settings->Control Panel->Service.
Click IIS Admin Service.
Click Start.
Click World Wide Web Publishing Service.
Click Start.
Close the window.
When you install Trailhead, you also install ServletExec from New Atlanta Communications. ServletExec is a Java-based Web application server that implements the Java Servlet API and JavaServer Pages (JSP) standards defined by Sun Microsystems.
The Trailhead Administrator pages are served through ServletExec, and the pages are set as access-controlled resources (URLs). If you have any questions about ServletExec, see the ServletExec User Guide that is packaged with the software.