#1 - Aug. 24, 2017, 10:39 p.m.
Blizzard Post
As we previously announced, we will be ending support for Windows XP and Windows Vista for several Blizzard games. For World of Warcraft, we’re ending support for these operating systems in October.

Microsoft ended mainstream support for these versions of Windows in 2009 and 2012, respectively, but since a segment of our audience was still using them at the time, we continued to support them. Now that there have been three major Windows releases since Vista’s release and a clear majority of our audience has upgraded to one of the newer versions of Windows, we are ready to make this change.

After this time, Windows XP and Vista will not be supported and World of Warcraft will not run on them. We encourage any players who are still using one of these older operating systems to upgrade to a newer version prior to this date to continue playing.