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"This Certificate Has an Invalid Digital Signature" Error Message After You Install the Windows NT 4.0 Security Rollup Package (Q305929)

The information in this article applies to:

  • Microsoft Windows NT Server version 4.0 SP6a
  • Microsoft Windows NT Server, Enterprise Edition version 4.0 SP6a
  • Microsoft Windows NT Workstation version 4.0 SP6a


When you visit a secure Web site (a site whose address begins with "https://") that uses Secure Sockets Layer (SSL), you may receive the following error message when you view the server certificate, even if the server certificate is properly trusted and valid:

This certificate has an invalid digital signature.
This problem occurs after you install the Windows NT 4.0 Security Rollup Package (SRP) on a computer that is running Microsoft Internet Explorer 5.5 Service Pack 2 (SP2) or Internet Explorer 5.01 Service Pack 2 (SP2). Note that this problem is with the user interface only; no functionality is lost.


A supported fix is now available from Microsoft, but it is only intended to correct the problem described in this article and should be applied only to systems experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:
NOTE : In special cases, charges that are normally incurred for support calls may be canceled, if a Microsoft Support Professional determines that a specific update will resolve your problem. Normal support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The following file is available for download from the Microsoft Download Center:
] Download Q305929i.exe now
Release Date: August 23, 2001

For additional information about how to download Microsoft Support files, click the article number below to view the article in the Microsoft Knowledge Base:
Q119591 How to Obtain Microsoft Support Files from Online Services
Microsoft used the most current virus detection software available on the date of posting to scan this file for viruses. Once posted, the file is housed on secure servers that prevent any unauthorized changes to the file.

The English version of this fix should have the following file attributes or later:
   Date         Time   Version       Size     File name    Platform
   05-Jul-2001  15:04  5.131.1877.9  371,472  Crypt32.dll  Intel
   27-Jun-2000  19:57  5.131.1877.9   62,736  Softpub.dll  Intel
NOTE : Because of file dependencies, this hotfix requires Microsoft Windows NT 4.0 Service Pack 6a.


Microsoft has confirmed this to be a problem in the Windows NT 4.0 Security Rollup Package.


For additional information about the SRP, click the article number below to view the article in the Microsoft Knowledge Base:

Q299444 Post-Windows NT 4.0 Service Pack 6a Security Rollup Package (SRP)

Published Aug 23 2001 8:03AM Issue Type kbbug
Last Modifed Aug 23 2001 8:03AM Additional Query Words
Keywords kbenv kberrmsg


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