Don't go spreading this around or you'll put me out of a job. http://v4.windowsupdate.microsoft.com/en/d...?corporate=true The security pack can't be updated as often as Microsoft release another security hotfix - that would be impractible. But it will give you a headstart after a reinstall of XP rather than having to use Windows Update from fresh. The package is not meant as a replacement for Windows Update, it has been compiled so that you can quickly and easily update your system after a reinstall of XP. We'll have to see how many bugs Windows XP Service Pack 2 introduces but if it seems pretty stable, there will be no further need for a security pack. Let's just wait & see.