This item updates the Stream Buffer Engine (SBE) and Encryptor/Decryptor (EncDec) components released in Windows XP Service Pack 1 (SP1). Download to use DirectShow to play back files created in Windows XP Media Center Edition. The ability to play back these files with DirectShow depends on the copy protection policy associated with the file. This update applies to the following operating systems: Windows XP Professional with Service Pack 1 installed Windows XP Home Edition with Service Pack 1 installed This update also has the following system requirements: Required: Windows XP-compatible DVD decoder installed Recommended: CPU with speed of 1 GHz or above Recommended: Graphics card with video memory of 32 MB or above. Download Q810243: Recommended Update - DirectShow playback support for Windows XP Media Center Edition recorded files