I am running Windows 7 and a few times a day the "Use a proxy server for your LAN (These settings will not apply to dial-up of VPN connections)." under "Local Area Network (LAN) Settings" checkbox becomes checked seemingly on it's own.

Screenshot of the Local Area Network (LAN) Settings

Am I pressing some kind of hidden keyboard shortcut accidentally? What sort of applications might alter this setting and why?

Unfortunately as this is a developer box, there's a lot of stuff that could be interfering, e.g. Visual Studio 2010, Windows Azure SDK and various browsers.

Has anyone else come across this?

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3 Answers

Are you on a Windows domain? If so then your system could be pulling down a policy for proxy settings each time you logon.

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I have seen infections change this setting within the last couple of months on one of my machines and several machines at work. I would run a full AV scan and check for Malware using two different scanners.

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It appears to be being caused by running unit tests in Visual Studio 2010.

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