Microsoft stopped supporting Windows XP on April 8, 2014 (with exceptional security updates being made e.g. in 2019, to address ransomware threats, and to address major malware threats, such as BlueKeep) and Microsoft and authorities warn users against still using Windows XP. However, Windows XP remained a popular operating system for a long time after its discontinuation around the world. By August 2019, Microsoft (and others) had ended support for games on Windows XP. As of June 2021, 0.6% of Windows PCs run Windows XP. Windows XP became the most popular operating system from 2001–2007, the operating system, individually and pre-installed, selling over 500 million copies.