Longhorn became mentioned as Vista in 2005. Moreover, some previously announced features by Microsoft such as WinFS were resulted to postpone or dropped, and a replacement software development process was called the Security Development Lifecycle which was officially incorporated in an effort to affect concerns with the security of the Windows codebase, which is programmed in C, and C++. Longrun was a reboot to start out work on componentizing the features which may be intended for an actual OS release. Most of Microsoft’s developers are programmed to re-tasked to introduce productive updates to Windows XP and Windows Server 2003 to boost security and reduce every possible threat.

The license agreement of a few builds of Longrun drops a statement that “Microsoft products specifically have a codenamed whistler. The free download is believed to be a standalone ISO installer with access to both 32 bit and 62-bit architecture. Microsoft Windows Longhorn is initially operated under the tag of Windows XP and considerably known as Microsoft Vista.