Those who have been playing Batman: Arkham City on the PC most likely know that the game has had some serious problems with bugs and crashes and pretty much everything you could list. One of these issues was specifically a problem with DirectX 11. Unfortunately not every Batman: Arkham City player will be able to use DirectX 11 yet, as 32-bit systems will still need to use DirectX 9.
Warner Brothers themselves have said that “Users running Windows 7 32 bit or Windows Vista 32 bit should ONLY use DX 9 settings until a future patch that addresses this specific issue is released. We are actively working to address the remaining issue tied to DX 11 for users running 32 bit versions of Windows Vista or Windows 7.” Thankfully however Batman: Arkham City’s developers RockSteady have released a new patch for the PC version to fix a number of issues which you can see below.