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根据微软提供的数据，除了23项已经通过Windows更新发布的重要安全更新外，Vista SP1还包含了551项补丁修复内容。551项？这数字大么？
先回顾一下其前辈-XP的补丁情况。XP SP1在RTM之后14个月发布，24项安全更新和297项补丁修复；23个月之后的SP2包含60项安全更新，666项补丁修复。
根据补丁分布情况，IE毫无意外的高居榜首，其次则是电源管理、存储、硬件及驱动。详情如下：
补丁分布情况：
75 Internet Explorer
41 Sleep/Hibernation & Power Management
38 Storage
35 Hardware and Drivers
35 Networking
28 Desktop and Shell
25 Printing & Scanning Technologies
25 .NET Framework, Data Components, Development Tools
24 Setup, Deployment, Backup, and Activation
24 Windows Media Center
23 International/Localization
20 Computer Management, Administration, and Tools
19 Application Compatibility
19 Multimedia
16 Performance and Reliability
16 Startup/Shutdown
13 Time Zone/Daylight Saving Time
13 Windows Media Player and Related Technologies
12 Security
12 Remote Access, VPN
8 IIS and WebDAV issues
7 Wireless Networking
7 Offline Files
6 Windows Mail and Web-based Software
5 Windows Sidebar and SideShow
5 Windows Portable Devices
