Mitigate Spectre Variant 2 and Meltdown in host operating system

Overview

About this script

This script improves your privacy on Windows.

These changes use Windows system commands to update your settings.

This script uses Batch (batchfile) scripting language.

Not Advised

This script should only be used by advanced users. This script is not recommended for daily use as it breaks important functionality. Do not run it without having backups and system snapshots.

Implementation Details

• Language: batch

• Required Privileges: Administrator rights

• Compatibility: Windows only

• Reversibility: Can be undone using provided revert script

Explore Categories

Enable protection against Meltdown and Spectre

This action belongs to Enable protection against Meltdown and Spectre category. This category configures Windows using 2 scripts. The category includes 2 subscripts. Read more on category page ▶

Security improvements

This action belongs to Security improvements category. This category encompasses a range of scripts designed to improve the security of your system by enforcing security best practices. These scripts help protect your system against various types of cyber threats and unauthorized access. Read more on category page ▶

Apply now

Choose one of three ways to apply:

1. Automatically via privacy.sexy: The easiest and safest option.
2. Manually by downloading: Requires downloading a file.
3. Manually by copying: Advanced flexibility.

Alternative 1. Apply with Privacy.sexy

privacy.sexy is free and open-source application that lets securely apply this action easily.

Open privacy.sexy

You can fully restore this action (revert back to the original behavior) using the application.

privacy.sexy instructions

1. Open or download the desktop application
2. Search for the script name: Mitigate Spectre Variant 2 and Meltdown in host operating system.
3. Check the script by clicking on the checkbox.
4. Click on Run button at the bottom of the page.

Alternative 2. Download

Irreversible Changes

This script is irreversible, meaning there is no straightforward method to restore changes once applied. Exercise caution before running, restoring it may not be possible.

1. Download the script file by clicking on the button below:

   Download script

2. Run the script file by clicking on it.

Download revert script

This file restores your system to its original state, before this script is applied.

Download restore script

Alternative 3. Copy

This is for advanced users. Consider automatically applying or downloading the script for simpler way.

1. Open Command Prompt as administrator.

HELP: Step-by-step guide

1. Click on Start menu

   Windows 11

   

   Windows 10

   

2. Type cmd

   Windows 11

   

   Windows 10

   

3. Right click on Command Prompt select Run as administrator

   Windows 11

   

   Windows 10

   

4. Click on Yes to run Command Prompt

   Windows 11

   

   Windows 10

   

---

Windows 11

Windows 10

2. Copy the following code:

Code to apply changes

:: Set the registry value: "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management!FeatureSettingsOverrideMask"
PowerShell -ExecutionPolicy Unrestricted -Command "$registryPath = 'HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management'; $data = '3'; reg add 'HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management' /v 'FeatureSettingsOverrideMask' /t 'REG_DWORD' /d "^""$data"^"" /f"
:: Set the registry value: "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management!FeatureSettingsOverride"
PowerShell -ExecutionPolicy Unrestricted -Command "$registryPath = 'HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management'; $data = '0'; reg add 'HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management' /v 'FeatureSettingsOverride' /t 'REG_DWORD' /d "^""$data"^"" /f"
:: Set the registry value: "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management!FeatureSettingsOverride"
PowerShell -ExecutionPolicy Unrestricted -Command "$registryPath = 'HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management'; $data = '64'; reg add 'HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management' /v 'FeatureSettingsOverride' /t 'REG_DWORD' /d "^""$data"^"" /f"

3. Right click on command prompt to paste it.
4. Press Enter to apply remaining code.

Copy restore code

Copy and run the following code to restore changes:

Revert code

:: Delete the registry value "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management!FeatureSettingsOverrideMask"
PowerShell -ExecutionPolicy Unrestricted -Command "reg delete 'HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management' /v 'FeatureSettingsOverrideMask' /f 2>$null"
:: Delete the registry value "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management!FeatureSettingsOverride"
PowerShell -ExecutionPolicy Unrestricted -Command "reg delete 'HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management' /v 'FeatureSettingsOverride' /f 2>$null"
:: Delete the registry value "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management!FeatureSettingsOverride"
PowerShell -ExecutionPolicy Unrestricted -Command "reg delete 'HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management' /v 'FeatureSettingsOverride' /f 2>$null"

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