Read registry on 64bit machine
var hlkm = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry64); var key = hlkm.OpenSubKey(@"SOFTWARE\JavaSoft\Java Plug-in\11.31.2"); var java = key.GetValue("JavaHome"); http://stackoverflow.com/questions/13728491/opensubkey-returns-null-for-a-registry-key-that-i-can-see-in-regedit-exe