How can I enable saving attachments in Microsoft Outlook Express 6?

Start Outlook Express.

From the Tools menu, select Options.

Select the Security tab.

Clear the "Do not allow attachments to be saved or opened that could potentially be a virus" check box, then click OK.
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Start a registry editor (e.g., regedit.exe).

Navigate to the HKEY_CURRENT_USERIdentities\{A5FA8995-AE1F-4D4A-8442-C51332A97476}SoftwareMicrosoftOutlook Express5.0Mail registry subkey.

Double-click Safe Attachments.

Set the registry value to 0 to allow saving of attachments or to 1 to use the application's default behavior.

Click OK.

Close the registry editor.