Just read this and thought it might be of interest:
"As Blizzard Entertainment continues to work on improving its games, it has decided to move forward sans the support for Windows XP and Windows Vista. The two Microsoft operating systems are already dated, and the video game company has also learned that most of its clients have already moved on to newer versions of the Windows OS.
Announcing the news on its General Discussion page, a Blizzard representative wrote that the process of terminating support for XP and Vista will commence later this year. What this means of course is the end of the road for “World of Warcraft,” “Diablo III,” “StarCraft II,” “Hearthstone” and “Heroes of the Storm” players who still use the aforesaid Microsoft operating systems on their daily drivers."