Windows is known for being overwhelmingly the most popular series of operating systems the world has ever known. Since the release of Windows NT and [Windows 95]?, Microsoft has sold current versions of Windows as stand-alone operating systems for computers based on Intel microprocessors. At one time, Microsoft produced versions for other processors such as the DEC Alpha, PowerPC and MIPS; as of the release of Windows 2000, Microsoft no longer develops these versions. See History of Microsoft Windows.
The current version of Windows is called Windows XP.
Often, conflicts between [device driver]?s or other harmful to fatal system errors result in Windows's famous Blue Screen of Death error message. This, along with the discovery of major security vulnerabilities, has led to a public perception and resigned acceptance of instability in the Windows product line. See OS Advocacy.