Unity,Win7提示SecurityException: A security error has been detected.

Unity执行这段代码，
Microsoft.Win32.Registry.LocalMachine.OpenSubKey("Software\\Wow6432Node\\Microsoft\\Windows\\CurrentVersion\\Run")

报异常：
SecurityException: A security error has been detected.
Microsoft.Win32.Win32RegistryApi.GenerateException (Int32 errorCode) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/Microsoft.Win32/Win32RegistryApi.cs:530)
Microsoft.Win32.Win32RegistryApi.OpenSubKey (Microsoft.Win32.RegistryKey rkey, System.String keyName, Boolean writable) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/Microsoft.Win32/Win32RegistryApi.cs:393)
Microsoft.Win32.RegistryKey.OpenSubKey (System.String name, Boolean writable) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/Microsoft.Win32/RegistryKey.cs:248)
Microsoft.Win32.RegistryKey.OpenSubKey (System.String name) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/Microsoft.Win32/RegistryKey.cs:232)
(wrapper remoting-invoke-with-check) Microsoft.Win32.RegistryKey:OpenSubKey (string)

经过反复测试，重现方法如下：
在注册表编辑器中，设置权限LocalMachine\\Software\\Wow6432Node\\Microsoft\\Windows\\CurrentVersion\\Run
EveryOne权限全都设置为“拒绝”

然后就能重现上面的错误
此问题无法解决，只能加try catch来判断读取失败