Microsoft Releases Service Pack 2 for All Versions of Windows XP & 2003
Microsoft Windows Service Pack 2 (SP2) is a cumulative service pack that includes the latest updates and provides enhancements to security and stability. In addition, it adds new features and updates to existing Windows computers.
Hotfix Scan Tool for Windows Server 2003 Service Pack 2 Deploymentx32 & x64 is a Visual Basic script file (HotfixScanTool.vbs). You can use this tool to scan for hotfixes that will potentially regress after you install Microsoft Windows Server 2003 Service Pack (Support: KB931940)
Watch out for
You'll want to uninstall IE 7 before upgrading from SP1 to SP2.
You'll want to install ADAM SP1 before upgrading to SP2 if you are running ADAM.
If you don't know what ADAM is, 99% of the time, you probably don't have it installed