Windows Media Player 10 reverts to the earlier version when you remove security update 911565 from a Windows Server 2003 Service Pack 1-based computer or from a Windows XP Service Pack 2-based computer (916735)

SYMPTOMS

For Windows Server 2003

Consider the following scenario:

• You use a Microsoft Windows Server 2003-based computer. The version of the Wmp.dll file on the computer is v.9.00.2991.
• You install security update 911565 on the computer. The version of the Wmp.dll file changes to v.9.00.3344.
  
  Note Security bulletin MS06-005 describes security update 911565.
  
  For more information about security bulletin MS06-005, click the following article number to view the article in the Microsoft Knowledge Base:

  911565 MS06-005: Vulnerability in Windows Media Player could allow remote code execution

• You install Windows Server 2003 Service Pack 1 (SP1) on the computer. Microsoft Windows Media Player 9 is upgraded to Windows Media Player 10. The version of the Wmp.dll file changes to v.10.00.3700.

In this scenario, when you remove security update 911565, the version of the Wmp.dll file reverts to v.9.00.2991. Additionally, you cannot start Windows Media Player.

For Windows XP

Consider the following scenario:

• You install Microsoft Windows XP Service Pack 2 (SP2) on a Windows XP-based computer. The version of the Wmp.dll file on the computer is 9.0.0.3250.
• You install security update 911565 on the computer. The version of the Wmp.dll file changes to 9.0.0.3344.
  
  Note Security bulletin MS06-005 describes security update 911565.
  
  For more information about security bulletin MS06-005, click the following article number to view the article in the Microsoft Knowledge Base:

  911565 MS06-005: Vulnerability in Windows Media Player could allow remote code execution

• You install Windows Media Player 10 on the computer. The version of the Wmp.dll file changes to 10.0.0.3802.

In this scenario, when you remove security update 911565, the version of the Wmp.dll file reverts to 9.0.0.3250. Additionally, you cannot start Windows Media Player.