Remaining High-Priority Updates
Your computer might be at risk until you install all high-priority updates. These updates help protect against security threats and performance problems.

  

Microsoft Windows XP x64 Edition

用於 Windows Server 2003 x64 Edition 和 Windows XP x64 Edition 的 Windows Internet Explorer 7
用於 Windows XP x64 Edition 的 Internet Explorer 8

這兩個不用安裝。