Office 2000 SP3 (o2ksp3a.exe - Update for Admin Installations) 
Two versions of the Office 2000 SP3 administrator update are available. To update your Office 2000 administrative installation point on the network, download o2ksp3a.exe into a new folder on your computer and double-click to extract o2ksp3a.exe. Then use Windows Installer to apply the update to the Office 2000 administrative image.
Caution : SR-1 or SR-1a must be installed before installing SP3.
Size ~ 59MB

Office 2000 SP3 (o2ksp3.exe - Standard Update) 
You can also install the standard Office 2000 SP3 update on a local server and allow clients to update their Office 2000 installations from there. Download o2ksp3.exe to a new folder on your computer, extract the files, and then run Setup.exe.
Caution : SR-1 or SR-1a must be installed before installing SP3.
Size ~ 13MB

Office 2000 SP2 (sp2admin.exe - Update for Admin Installations) 
Two versions of the Office 2000 SP2 administrator update are available. To update your Office 2000 administrative installation point on the network, download sp2admin.exe into a new folder on your computer and double-click to extract sp2admin.exe. Then use Windows Installer to apply the update to the Office 2000 administrative image.
Caution : SR-1 or SR-1a must be installed before installing SP2.
List of fixes Bugs (at Microsoft's Site)
Size ~ 30MB

Office 2000 SP2 (sp2upd.exe - Standard Update) 
You can also install the standard Office 2000 SP2 update on a local server and allow clients to update their Office 2000 installations from there. Download sp2upd.exe to a new folder on your computer, extract the files, and then run Setup.exe.
Caution : SR-1 or SR-1a must be installed before installing SP2.
List of fixes Bugs (at Microsoft's Site)
Size ~ 9MB

Office 2000 SR-1 (data1.exe - Update for Admin Installations) 
Two versions of the Office 2000 SR-1 administrator update are available. To update your Office 2000 administrative installation point on the network, download Data1.exe into a new folder on your computer and double-click to extract Data1.msp. Then use Windows Installer to apply the update to the Office 2000 administrative image.
Size ~ 137MB

Office 2000 SR-1 (o2ksr1dl.exe - Standard Update) 
You can also install the standard Office 2000 SR-1 update on a local server and allow clients to update their Office 2000 installations from there. Download O2ksr1dl.exe to a new folder on your computer, extract the files, and then run Setup.exe.
Size ~ 52MB

Outlook 2000 Holidays (after 2002) 
Outlook 2000 only supports Holidays until the end of 2002. Overwrite your OUTLOOK.TXT on your System to get Holidays until the end of 2012.

Outlook 2000 Email Attachment Security Update 
Now available for download, this patch will increase the security protection provided by Outlook 2000 for certain types of email attachments. Once installed, this patch will change the attachment dialog box when certain attachments such as executables are opened, so that customers see more explicit warning language and will be required to save the attachment to the file system before opening it. This patch can help you avoid accidentally releasing viruses that hide in .exe files. It is important to note that saving the attachment to the file system does not automatically remove any virus that may be present. Before opening the attachment it is imperative you first scan it using an updated anti-virus software program.
Do not use this Patch on Outlook 97/98 !