IntelDPSTDisable

Program.cs

using System;
using Microsoft.Win32;

namespace IntelDPSTDisable {
    class Program {
        static string RegPath = @"System\{0}\Control\Class\{{4d36e968-e325-11ce-bfc1-08002be10318}}\{1}";
        static string[] CSs = new[] { "ControlSet001", "CurrentControlSet" };
        static string[] IDs = new[] { "0000", "0001" };

        static string FeatValue = "FeatureTestControl";
        static int[] FeatBit = new[] { 0x10, 0x10, 0x00 }; // mask, disable, enable

        static string PwrValue1 = "DCUserPreferencePolicy";
        static string PwrValue2 = "PowerDcPolicy";
        static string PwrValue3 = "PowerAcPolicy";
        static int[] PwrBit = new[] { 0x02, 0x00, 0x02 }; // mask, disable, enable

        static int MaskSet(int val, int mask, int set) {
            return (val & ~mask) | (set & mask);
        }

        static void ProcessValue(RegistryKey subkey, string value, int[] bits, bool isEnable) {
            int oval = (int)subkey.GetValue(value);

            if((oval & bits[0]) != bits[1]) {
                int nval = MaskSet(oval, bits[0], bits[isEnable ? 2 : 1]);
                Console.WriteLine("  * {0} = {1:X8}, wrong!", value, oval);
                Console.WriteLine("    > Resetting to {0:X8}", nval);

                subkey.SetValue(value, nval);
                int vval = (int)subkey.GetValue(value);
                Console.WriteLine("    Verification: {0:X8} == {1:X8}", nval, vval);
                if(nval != vval) {
                    Console.WriteLine("    > Verification failed!");
                }
            } else {
                Console.WriteLine("  * {0} = {1:X8}, already correct", value, oval);
            }
        }

        static void Main(string[] args) {
            Console.WriteLine("Select option:");
            Console.WriteLine(" 1. Disable DPST");
            Console.WriteLine(" 2. Enable DPST");
            Console.Write("> ");

            bool isEnable;
            switch(Console.ReadKey().Key) {
            case ConsoleKey.D1:
                isEnable = false;
                Console.WriteLine("\nDisabling DPST...\n");
                break;
            case ConsoleKey.D2:
                isEnable = true;
                Console.WriteLine("\nEnabling DPST...\n");
                break;
            default:
                Console.WriteLine("Invalid option selected");
                return;
            }

            foreach(var cset in CSs) {
                Console.WriteLine("Checking control set {0}...", cset);

                foreach(var ikid in IDs) {
                    var path = String.Format(RegPath, cset, ikid);
                    var subkey = Registry.LocalMachine.OpenSubKey(path, true);

                    if(subkey.GetValue(PwrValue1) is null) continue;
                    Console.WriteLine("* {0}", path);

                    ProcessValue(subkey, PwrValue1, PwrBit, isEnable);
                    ProcessValue(subkey, PwrValue2, PwrBit, isEnable);
                    ProcessValue(subkey, PwrValue3, PwrBit, isEnable);

                    ProcessValue(subkey, FeatValue, FeatBit, isEnable);
                }

                Console.WriteLine();
            }

            Console.WriteLine("Completed. Press any key to exit...");
            Console.ReadKey(true);
        }
    }
}