Windows 7 Upgrade Advisor tool failed to run with error message “Windows 7 Upgrade Advisor was unable to reach the Microsoft server for compatibility information. Check your internet connection and try again later.”

Article ID: 2448270 - View products that this article applies to.
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SYMPTOMS

When you run the Windows 7 Upgrade Advisor tool on a system that must use a proxy in order to access the internet you receive the error:

 
“Windows 7 Upgrade Advisor was unable to reach the Microsoft server for compatibility information.  Check your internet connection and try again later.”

CAUSE

Windows 7 Upgrade Advisor tries to reach the Microsoft server to get the compatibility information. The error is shown since Windows 7 Upgrade Advisor does not support proxy authentication.

In the error log (%temp%\WuaDiagnostics.log) you can see the update advisor tries to access:

http://aeos.microsoft.com/compatibilityexchange/compatibilityexchange.svc and then receives the error like following:

[7/23/2010 12:04:41 PM] Exception: The request failed with HTTP status 407: Proxy Authentication Required

RESOLUTION

On the proxy, create an anonymous access rule specific to the destinations FQDN's used by the Windows 7 Upgrade Advisor, for example, you may create the following rules:

Action: Allow
Protocols: HTTP, HTTPS
From/Listener: Internal
To: Domain Name Set
aeos.microsoft.com
aestats.microsoft.com
crl.microsoft.com
download.microsoft.com
go.microsoft.com

Condition: All Users
Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.

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Article ID: 2448270 - Last Review: October 19, 2010 - Revision: 1.0
APPLIES TO
  • Windows 7 Enterprise
  • Windows 7 Professional
  • Windows 7 Ultimate
Keywords: 
KB2448270

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