This update resolves the "Windows Media Player .asf processor contains unchecked buffer" security vulnerability in Windows Media Player, Windows Millennium Edition (Windows Me), and Windows 2000, and is discussed in Microsoft Security Bulletin MS01-056. Download now to help prevent a malicious user from running code of his or her choice on your computer.

The vulnerability is the result of an unchecked buffer in a section of Windows Media Player that handles .asf files. This update eliminates the vulnerability by correctly processing .asf files.

For more information about this issue, read Microsoft Security Bulletin MS01-056. (This site is in English.)

• Windows Media Player 7.1
• Windows Media Player 7.0
• Windows Media Player 6.4

This update also applies to the following operating systems with or without Windows Media Player:

• Windows 2000
• Windows Me