Started InternetExplorerDriver server (64-bit)
2.42.0.0
Listening on port 29792
Exception in thread "main" org.openqa.selenium.remote.SessionNotFoundException: Unexpected error launching Internet Explorer. Protected Mode settings are not the same for all zones. Enable Protected Mode must be set to the same value (enabled or disabled) for all zones. (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 1.27 seconds
Build info: version: '2.46.0', revision: '87c69e2', time: '2015-06-04 16:17:10'
System info: host: 'DT-PC', ip: '10.0.21.191', os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version: '1.8.0_60'
Driver info: org.openqa.selenium.ie.InternetExplorerDriver
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:204)
at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:162)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:605)
at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:242)
at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:227)
at org.openqa.selenium.ie.InternetExplorerDriver.run(InternetExplorerDriver.java:182)
at org.openqa.selenium.ie.InternetExplorerDriver.<init>(InternetExplorerDriver.java:174)
at org.openqa.selenium.ie.InternetExplorerDriver.<init>(InternetExplorerDriver.java:146)
之前做的基本使用python语言没有遇到过这个问题，这周开始使用java语言进行编写脚本。在测试多浏览器的时候，测到IE出现了这个问题，想起来要修改IE的安全设置。
工具--》Internet选项===》安全 ---》选择要查看的安全区域（Internet，本地Intranet，可信站点，受限站点）启用或禁用保护模式。
设置完这个就OK了。