Quote:

Microsoft revealed on the official DirectX blog that Blizzard's World of Warcraft game is the first game to support DirectX 12 on Windows 7.

DirectX, a set of multimedia APIs used especially in PC games, is included natively in Windows. Microsoft releases new versions of DirectX regularly that introduce new features and improvements.

The company announced DirectX 12 in 2014 and launched it officially in Windows 10 in 2015. Microsoft decided to make DirectX 12 Windows 10 exclusive which meant that customers who ran Windows 7 or Windows 8.1 were limited to DirectX 11. This was not the first time that Microsoft decided to limit DirectX though.

When it released Windows Vista in 2006, it made DirectX 10 a Vista exclusive. The exclusivity backfired back then as the majority of game developers ignored DirectX 10 and focused on DirectX 9.0 instead which Windows XP supported as well.

According to Microsoft's blog post, it was Blizzard and other game companies that wanted to bring DirectX 12 support to their games on Windows 7. DirectX 12 offers advantages, such as low-level programing APIs or multi-GPU support, over previous versions of DirectX.