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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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Wow, this is an old question, and I am having this exact problem. Except I am not running Visual Studio (that I know of). Anyone have any updates to this? Should I re-ask this question perhaps? –  Larian LeQuella Nov 16 '13 at 4:37
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4 Answers

Check out this link if you're using Visual Studio 2010 unit testing features

Proxy Server settings being set automatically which is causing me not to be able to run manual test.

Can you turn OFF the Diagnostic Data Adapter "ASP.NET Client Proxy for IntelliTrace and Test Impact" and check if you are still facing this issue? To do this perform the following steps.

Plan->Properties-> Manual Runs : Test Settings -> to open the test settings wizard.

In the test settings wizard, go to "Data and Diagnostics Tab" and turn off "ASP.NET Client Proxy...". Click on Finish and remember to save the plan. Now execute the tests and see if you are still facing this issue.

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up vote 3 down vote accepted

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

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Hi, I'm using VS 2012 and 2013, and getting the same weird behavior of having my proxy settings turned on. It may be that VS unit tests are causing this, but how did you fix the problem? –  Shaul Feb 20 at 14:01
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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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