A last-minute glitch discovered in Windows XP SP3 led Microsoft to again delay the release of the service pack via the Windows Update service as well as from Microsoft's Download Center. The problem is present in both XP SP3 and Vista SP1 and affects users of Microsoft’s electronic checkout system. The problem affects only a small number of customers, Microsoft decided to remove the update until a short-term fix is in place to prevent users of Microsoft Dynamics Retail Management System from downloading and installing the service pack. Scheduled to be released via the update service today, the service pack is still available from Microsoft’s web site for those willing to dig around a little. The service pack has already been released to OEMs and system builders.