Article ID: 259514 - View products that this article applies to.
This article was previously published under Q259514
Microsoft Outlook 2000 Service Release 1 (SR-1) provides an attachment security feature that is designed to increase the security protection for certain types of e-mail attachments. This feature provides explicit warning language when attachments are opened, and you are required to save the attachment to the file system before opening it. This can help you avoid accidentally releasing viruses that hide in certain file types.
Note: In previous versions of Outlook, this functionality was provided in three separate patches: one for each version of Outlook.
When you open attachments with file name extensions such as .exe, .bat, .com, or .cmd, you receive the following warning message:
Caution: The attachment warning runs for all attachments with executable file name extensions. It does not detect, or clean a virus from an infected attachment. If you save a file that has a virus, and then run it from the hard disk, your computer is still infected. Saving the file is simply an extra precaution to take when considering the safety of the attached file. You must still use an updated virus-scanning program to check the file for a possible virus.
Attachment Security Warning
The file may contain a virus that can be harmful to your computer. It is important to be VERY certain that this file is safe before you open it. You must save this file to disk before it can be opened.
Filename: "file name"
Type: "file type"
To save the attachment, click Save to Disk.
Microsoft Office files, such as .doc, .xls, or .ppt, are not affected by this patch, and behave just as they did before installing the patch. To control macro behavior for Office documents, set the security level in the individual Office program itself.
To Modify the Behavior of the Attachment Security WarningImportant This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/322756/ )How to back up and restore the registry in Windows
To either add, or remove file types for the Attachment Security Warning, follow these steps:
(http://support.microsoft.com/kb/235309/EN-US/ )Outlook E-mail Attachment Security Update