Microsoft KB Archive/169211

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MBS: Client DPA Setup Error "Cannot Modify Registry Error - 1"

Article ID: 169211

Article Last Modified on 2/18/2004


  • Microsoft Commercial Internet System 1.0 Service Pack 2
  • Microsoft Membership Server

This article was previously published under Q169211


The Distributed Password Authentication (DPA) client upgrade for Microsoft Internet Explorer fails, and you receive the following error message during installation:

Cannot modify registry error -1


The DPA installation tries to modify a flag in the following registry key:

HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\Security

If the key is absent, Setup generates the error message and fails to finish. The DPA upgrade is installed so that DPA will work, however MSN (The Microsoft Network) is not supported.

This also occurs if the Security Providers Value (which is also located in the preceding registry key) is missing.


Reinstall Microsoft Internet Explorer version 3.02 or later and then run the DPA upgrade.


Microsoft has confirmed this to be a problem in Microsoft Commercial Internet System version 1.0. This problem has been corrected in the latest U.S. Service Pack for Microsoft Commercial Internet System version 1.0. For information on obtaining the Service Pack, query on the following article in the Microsoft Knowledge Base:

183062 MCIS 1.0 Service Packs 1 and 2 Information

Additional query words: sp2 mbs

Keywords: kbbug kbfix KB169211