Windows Vista SP1の修正バグは551個

SP1をインストールせずとも、Windows Updateで適応されているものもあります。
XP SP1では、297個の Hotfix とのことです。

修正カテゴリ：

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

◇Vista SP1 rolls up 551 bug fixes(ZDNet.com)