Windows Service applications run in a different window station than the interactive station of the logged-on user. A window station is a secure object that contains a Clipboard, a set of global atoms, and a group of desktop objects.
That is the nature of the business is a term that means that  something happens because it is common experience for the event you  are performing or doing.
Definition of business for English Language Learners. : 1  the activity of making, buying, or selling goods or providing services in exchange for money. : 2  work that is part of a job. : 3  the amount of activity that is done by a store, company, factory, etc.