The Open button does not appear in the "File Download - Security Warning" dialogue box when you try to download a certificate file in IE7
You try to download a certificate (.cer) file in Windows Internet Explorer 7 on a computer that is running Microsoft Windows Server 2003. In this scenario, the Open button does not appear in the File Download - Security Warning dialog box. Instead, the Find button appears.
• If you save the certificate file to disk and then open the file, the file opens successfully.
• This problem does not occur in Microsoft Internet Explorer 6. This problem also does not occur on computers that are running Windows XP, even if you use Internet Explorer 7.