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"Error IUENGINE Querying software update catalog from" Windows Update.Log

I've noticed I'm getting errors similar to the following in the 'Windows Update.log' file on some of my SUS clients:

<date time> Error IUENGINE Querying software update catalog from http://servername/autoupdatedrivers/getmanifest.asp (Error 0x80190194

Contributed By: Cliff Hobbs [MVP SMS]
As documented in Microsoft Knowledge Base Article 326596 'Error 0x80190194 Is Logged in the Windows Update.log File When the Client Queries "/autoupdatedrivers/getmanifest.asp"', this error is normal behaviour and will only occur in those cases when the client checks with the SUS Server for driver updates that SUS doesn't synchronise.

Contributed By: Rick Anthony [updated 06/07/04]
The eventual fix was to review and set the IIS Lockdown and URL Scan settings (via *.ini files) to their appropriate values.

We had uninstalled SUS, IIS Lockdown and URL Scan. Subsequent reinstall of SUS did not reinstall IIS Lockdown and URL Scan therefore they were reinstalled manually. The manual install resulted in both *.exe and *.asp files being blocked.