Windows XP Service Pack 1 (SP1) provides the latest security, reliability, and performance updates to the Windows XP family of operating systems. Windows XP SP1 is designed to ensure Windows XP platform compatibility with newly released software and hardware, and includes updates to resolve issues discovered by customers or by Microsoft's internal testing team. The maximum download size is approximately 30 MB, however the size of the download and time required may be less for computers that have had updates previously installed. To minimize the download time needed for installation, setup will only download those files which are required to bring your computer up to date. Windows XP SP1 includes Internet Explorer 6 SP1. Anti-virus software programs may interfere with the installation of Windows XP SP1. Please disable anti-virus software while installing the service pack. Microsoft recommends installing SP1 because it includes many of updates to help keep your computer secure. Once you have installed the service pack you should check back for additional updates.

Typical download times for the Express installation:
All 32-bit Platforms: 30 MB | 1.25 hours @ 56K | 3 minutes @ T1

• Operating system You can install SP1 only on computers running Windows XP Professional or Windows XP Home Edition.
• Disk space The recommended space requirements depend on how the Windows XP SP1 is installed. The space requirements are the same whether you install from the stand-alone Service Pack CD or from this Web site, but are different if you install from a network distribution share. For details, read the Microsoft Knowledge Base (KB) Article Q326583, “Hard Disk Space Requirements for Windows XP Service Pack 1” in the Microsoft Knowledge Base.

1. Click Start, and then click Control Panel.
2. Double-click Add/Remove Programs.
3. Click Windows XP Service Pack 1.
4. Click Change/Remove.