Microsoft has released security bulletin MS06-028. The security bulletin contains all the relevant information about the security update for Microsoft PowerPoint 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 the security update for PowerPoint 2000 (KB916520), you cannot remove the update. To revert to an earlier installation of PowerPoint 2000, you must remove PowerPoint 2000 and then reinstall it from the original installation disk.