Specify how you want the SSIEnableCmdDirective registry value for the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W3SVC\Parameters registry key to be set on the target system. The SSIEnableCmdDirective registry value controls whether the Web server allows the #exec CMD directive of server-side includes (SSIs) to be used to execute shell commands. Valid options are:

- Ignore—Do not change the SSIEnableCmdDirective registry value on the target system. This is the default option.
- FALSE (0)—Set the SSIEnableCmdDirective registry value on the target system to 0. This prevents the #exec CMD directive of server-side includes to be used to execute shell commands. Note that if you select this value and an IIS Web server has applications that rely on #exec CMD directives, those applications may stop working properly after your installation project's Web site and virtual directory are installed.
- TRUE (1)—Set the SSIEnableCmdDirective registry value on the target system to 1. This allows the #exec CMD directive of server-side includes to be used to execute shell commands.

If you select the FALSE or TRUE options, InstallShield stores the value—either 0 for FALSE or 1 for TRUE—in the INSTALLSHIELD_SSI_PROP property.

For IIS 4, the SSIEnableCmdDirective registry value is set to TRUE (1) by default. Because of security concerns, the default value is FALSE (0) starting with IIS 5; the 0 value prevents end users from running unauthorized server-side executable files.

If your product is uninstalled from a target system, the SSIEnableCmdDirective registry value is not changed, even if its value was changed during installation.