If you are like the majority of computer users, you are using a Windows XP operating system. Even though Microsoft Vista has been released since 2007, more people are still using XP than any other operating system by any company combined. Now, since October 2009, the latest version of the Windows operating systems is Windows 7.

Before XP, Windows released a series called the Windows NT’s. Even after they stopped using this name (the last one being Windows NT 4.0) Windows operating systems were still being created with the NT code base. Therefore, Windows 2000 was technically Windows NT 5.0, XP was also known as Windows NT 5.1, and Vista was Windows NT 6.0. In case you wondered where the name came from, Windows 7 is the seventh version of the NT code base operating systems. posse.