Windows Vista is a graphical operating system built for personal computers. Which is used in personal computer cases. Vista can be used on desktops , laptops , tablet PCs and Media Center computers. When Vista started operations on July 22, 2005, Vista was known as Longhorn. Construction of Vista was completed on November 8, 2006. Over the next three months, hardware and software makers , business buyers and retailers began to come to Vista. Vista officially started marketing on January 30, 2006 and is in the public domain. Vista was downloaded from Microsoft's website. Vista's predecessor operating system Windows XP was released almost five years later. This is the longest time since the release of Microsoft's Windows T based operating system. According to Wikipedia.