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.
(October 2011) A home business (or home-based business or HBB) is a small business that operates from the business owner's home office. In addition to location, home businesses are usually defined by having a very small number of employees, usually all immediate family of the business owner, in which case it is also a family business.