Microsoft has released security bulletin MS06-037. The security bulletin contains all the relevant information about the security update for Microsoft Excel 2000. This information includes file manifest information and deployment options. To view the complete security bulletin, visit one of the following Microsoft Web sites, depending on whether you are a home user or an IT professional:
After you install this update, you cannot remove the update. To revert to an earlier installation of Excel 2000, remove Excel 2000 from the computer. Then, reinstall Excel 2000 by using the original Excel 2000 installation CD.