Microsoft announced today that Windows XP Service Pack 3 will be released on April 29, although there will be a delay before it is pushed through the Automatic Update process.
The service pack incorporates the hundred or so patches that have been released since Service Pack 2, which have been making it a time-consuming slog to set up a new WinXP computer for the last year or more. There are virtually no new features; if a computer has been kept up to date, the service pack will change nothing onscreen and will make almost no changes under the hood.
Here’s more detailed information about Windows XP Service Pack 3.