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.
business. 1  an occupation, profession, or trade: His business is poultry farming. 2  the purchase and sale of goods in an attempt to make a profit. 3  a person, partnership, or corporation engaged in commerce, manufacturing, or a service; profit-seeking enterprise or concern.