Active Setup is a mechanism for executing commands once per user early during login.
Active Setup is used by some Microsoft Windows operating system components like Internet Explorer to set up an initial configuration for new users logging on for the first time.
Active Setup is also used in some corporations’ software distribution systems to create an initial customized user environment.
The machine part consists of a list of components identified by a GUID each.
For that reason it does not run in Citrix XenApp / Microsoft RDS published applications.