SharePoint Portal Server 2003 Service Pack 1

SharePoint Portal Server 2003 Service Pack 1 (SP1) contains significant security enhancements, in addition to stability and performance improvements.

http://www.microsoft.com/downloads/details.aspx?FamilyId=FD3AB750-C622-4488-BD06-8F5D8347E3D2

To install the update, you must have the following:  Windows SharePoint Services Service Pack 1 which is available at: http://www.microsoft.com/downloads/details.aspx?FamilyId=875DA47E-89D5-4621-A319-A1F5BFEDF497

Windows SharePoint Services Service Pack 1 (SP1) contains significant security enhancements, in addition to stability and performance improvements.

SP1 also includes stability improvements developed as a result of user input from the Microsoft Online Crash Analysis in Windows SharePoint Services and from Microsoft Product Support feedback.