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.
nature(noun) the essential qualities or characteristics by which something is recognized. it is the nature of fire to burn; the true nature of jealousy. nature(noun) a causal agent creating and controlling things in the universe. the laws of nature; nature has seen to it that men are stronger than women.