A. An Outlook Security patch causes this behavior. Microsoft designed the patch to protect you from opening attachments that could contain a virus. This "feature" is included in Microsoft Office Service Pack 2 (SP2). Unfortunately, you can't turn the feature off or uninstall it. The only workaround is to uninstall Office 2000 and reinstall it without SP2. As an alternative, you can ask people to send you the executables in a zip file.