The Office 2000 SR-1a update includes the original Office 2000 SR-1 update and the Office 2000/Windows 2000 Registry Repair Utility. The functionality of this utility is the only addition to the SR-1a update. If you have already installed the SR-1 update and have not upgraded from Windows NT 4 to Windows 2000, you do not need this utility. If you have upgraded from Windows NT 4 to Windows 2000 and have already installed the SR-1 update, you should only install the Office 2000/Windows 2000 Repair Utility. All other users should install the SR-1a update. To determine if SR-1a is installed on your computer, please see "How To Tell if the SR-1a Update Has Been Applied."