ProxyUnsetter is a simple, Windows Tray application that will unset your proxy when it's been set by another process or group policy.
When you right-click on the tray icon, you can force unset proxy, set to 127.0.0.1:8080, settings, about, or exit.
ProxyUnsetter is portable, small and easy to use by design. There are fours options and a whitelist. The options are unset proxy automatically, notify when proxy set, launch with Windows and check for new releases weekly. IP whitelist simply has an add or delete option.
ProxyUnsetter has no frills and nothing beyond what it promises to do which is a nice change.