Microsoft.Win32.RegistryKey Sp3 = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon", true);  
Sp3.SetValue("SFCSetting", 0xffffff9d, Microsoft.Win32.RegistryValueKind.DWord);    // Возникает ерор    The type of the value object did not match the specified RegistryValueKind or the object could not be properly converted.         
Sp3.Close();