Windows XP Service Pack 1 (SP1) provides the latest security, reliability, and performance updates to the Windows XP family of operating systems. OS: Windows XP. Category: System Updates.

The modifications within the service pack are built into subsequent versions of the OS distributed on CD or DVD. Versions are identified as SP1, SP2, etc.; for example, "Windows XP SP2." ...

The service pack incorporates Windows XP SP1, including the .Net Framework and changes to the user interface as required by the company's antitrust settlement with the government. The SP1 ...