Last week Microsoft announced Window XP SP3 RC2 available download through Window Update.You will feeling that the download speed are quite slow.Now,there have standalone download in English,German and Japanese language.
1.English Version XP SP3 RC2 (size 315.2 MB)
2.German Version XP SP3 RC2 (size 312.0 MB)
3.Japanese Version XP SP3 RC2 (size 324.5 MB)
More Details please visit XP SP3 RC2 standalone release note.
Please remember that you needed to uninstall pre-upgrade version XP SP3 before download this .Moreover,you can visit my post how to easily install this new version without uninstall previous upgrade XP SP3 version.