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Article ID: 945121 - Last Review: February 14, 2008 - Revision: 2.1

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Consider the following scenario:
  • You try to enroll a certificate from a certificate enrollment Web page.
  • The certificate that you receive from the certification authority is an unsigned PKCS7 response.
  • The certificate chain for the new certificate cannot be built, or the chain validation fails.
  • To install the end entity certificate on a client computer, the certificate enrollment Web page uses the InstallResponse method of the IX509Enrollment interface of the CertEnroll COM object.
In this scenario, when you use Windows Internet Explorer 7 to open the certificate enrollment Web page and to install the end entity certificate on a Windows Vista-based client computer, the installation may fail. Additionally, you may receive one of the following error messages from the InstallResponse method of the IX509Enrollment interface:
Error Code: E_ACCESSDENIED 0x80070005L
Error Message: "General access denied error"
This error occurs if the certificate response is installed using a InstallResponseRestrictionFlags such as AllowUntrustedRoot other than AllowNone.
Error Code: CERT_E_CHAINING 0x800B010AL
Error Message: "A certificate chain could not be built to a trusted root authority"
This error occurs if the certificate chain response contains an end entity certificate but not the complete certificate chain to a root CA.
Error Code: CERT_E_UNTRUSTEDROOT 0x800B0109L
Error Message: "A certificate chain processed, but terminated in a root certificate which is not trusted by the trust provider"
This error occurs if the certificate chain response is containing the leaf end entity certificate chaining to an untrusted root CA.


Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: (
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


There are no prerequisites for installing this hotfix.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
Windows Vista, x86-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Update.mumNot applicable1,80517-Jan-200810:56Not applicable
X86_c11b445761001999864b51e748b75060_31bf3856ad364e35_6.0.6000.20755_none_45c76b5c43cf83aa.manifestNot applicable71317-Jan-200810:56Not applicable
X86_microsoft-windows-x..rtificateenrollment_31bf3856ad364e35_6.0.6000.20755_none_f20906edaac1f958.manifestNot applicable554,10217-Jan-200804:41Not applicable
Windows Vista, x64-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Amd64_f375653d6c7abb5cb86eca9450616332_31bf3856ad364e35_6.0.6000.20755_none_4340e664ca197f58.manifestNot applicable1,07417-Jan-200810:56Not applicable
Amd64_microsoft-windows-x..rtificateenrollment_31bf3856ad364e35_6.0.6000.20755_none_4e27a271631f6a8e.manifestNot applicable554,14017-Jan-200804:59Not applicable
Update.mumNot applicable2,04617-Jan-200810:56Not applicable


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


After you apply this hotfix, you can install the certificate that is issued by an untrusted certification authority from a certificate enrollment Web page that uses the AllowUntrustedRoot flag.

The certificate enrollment Web page must be modified to make sure that the AllowUntrustedRoot flag is used when the InstallResponse method is called as follows:
objEnroll.InstallResponse(4, EnrollResponse, 0, "")
  • Clients that are running Windows Vista must have this hotfix applied when the AllowUntrustedRoot flag is passed. Otherwise, the enrollment process will fail.

    This change does not apply to clients that are running earlier versions of Windows operating systems.
  • The value of the third parameter depends on whether the certificate response contains a Base64 header. The value of this parameter can be 0 or 1.
For more information about InstallResponseRestrictionFlags enumeration, visit the following Microsoft Web site: (
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684  ( ) Description of the standard terminology that is used to describe Microsoft software updates

  • Windows Vista Business
  • Windows Vista Enterprise
  • Windows Vista Home Basic
  • Windows Vista Home Premium
  • Windows Vista Ultimate
  • Windows Vista Business 64-bit Edition
  • Windows Vista Enterprise 64-bit Edition
  • Windows Vista Home Basic 64-bit Edition
  • Windows Vista Home Premium 64-bit Edition
  • Windows Vista Ultimate 64-bit Edition
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