Windows XP Service Pack 1a

Windows XP Service Pack 1a (SP1a) provides the latest security and reliability updates to the Windows XP family of operating systems, and includes Internet Explorer 6 SP1. Windows XP SP1a is designed to ensure Windows XP platform compatibility with newly released software and hardware, and includes updates that resolve issues discovered by customers or by Microsoft's internal testing team.

If you have already installed Windows XP SP1, you do not need to install Windows XP SP1a.

:arrow: view:Differences Between Windows XP SP1 and Windows XP SP1a

:arrow: Download XP SP1a: Express Install | Network Install

NOTE: the Network Install option is recommended if you want to backup the complete Service Pack for future installations, i.e following a reformat.