This computer is running a Windows service pack
After you upgrade to Windows Small Business Server 2003, you must reinstall your existing Windows Server 2003 service packs and hotfixes.
To continue Setup, select the I acknowledge all warningscheck box.
If you are upgrading the evaluation version of Windows uis3lte.Small Business Server 2003 to the retail version or if you are upgrading Windows Server 2003, Standard Edition, you must reinstall your existing service packs and hotfixes after Setup is complete. To do so, after Setup is complete, it is recommended that you connect to the Microsoft Web site (http://go.microsoft.com/fwlink/?LinkID=19325) and scan for critical updates and service packs.
To determine which Windows Server 2003 service packs are installed on the computer, click Start, click Run, and then type Control. Double-click System, and then check the system properties on the General tab. After Setup is complete, it is recommended that you check for the latest service packs.