For target systems that run Microsoft Windows NT or Windows 2000 or later, this property indicates whether the environment variable name refers to a system or user environment variable. If the target system runs Microsoft Windows 9x, this property is ignored.

Select one of the following options from the drop-down menu:

- System—Creates, modifies, or removes the system environment variable specified.
- User—Creates, modifies, or removes the environment variable from the user's environment. The environment variable specified is available only to the end user who is logged on at the time of installation.