Mitigate Spectre Variant 2 and Meltdown in host operating system

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Works with Windows 10 and 11Works with Windows Vista, XP, 7, 8, 10, 11, and Windows Server 2008 or newer.

• Single actionThis page belongs to a script, containing basic changes to achieve a task.
• Windows onlyThis script improves your privacy on Windows
• Impact: HighSystem Functionality Loss Risk: High
  This action improves privacy with high impact when you run the recommended script.
• Batch (batchfile)These changes use Windows system commands to update your settings.
• Fully reversible

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

  The restore/revert methods provided here can help you fix issues.

Overview

Missing Good Quality Documentation

This page does not yet meet PrivacyLearn's documentation standards. However, the script/action is stable and verified by community. Here are some options for you to understand its functionality:

Computer-generated docs ^(PREVIEW)

This documentation may be low quality but still useful.

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This documentation is automatically extracted from the code implementation.

To align with advanced important privacy security, this entry illuminates the concept of: mitigate Spectre Variant 2 and Meltdown in host operating system Windows. Keeping with this idea, this collection streamlines the process for the workflow to reverse the changes.

European Union recognizes online privacy maintenance as a fundamental human right. Start using important privacy maintenance preferences: browse the options and decide what fits. Ensure each step is completed before moving on to the next.

References

• Data Privacy and Data Protection: The Right of User’s and the Responsibility of Companies in the Digital World.
• Microsoft Security Hub
• NIST Cybersecurity Framework

Technical Details

This configuration changes registry changes to help maximize online data privacy maintenance and this instruction set can also help to obtain precise privacy configurations. It can also help optimizing system configurations to be able to speed up everyday tasks.

Explore similar guides

Gives more context about the goal of the changes

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Review code

Requires technical knowledge about Batch (batchfile)

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Requires technical knowledge about YAML and Git

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Not Advised

This script should only be used by advanced users.

This script is not recommended for daily use as it breaks important functionality.

Consider creating a system restore point before doing any changes.

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Choose one of three ways to apply:

Download script

Download and run the script directly

• No app needed
• Offline usage
• Easy-to-apply
• Free
• Open-source

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Help

How to apply or restore "Mitigate Spectre Variant 2 and Meltdown in host operating system" using script

• ≈ 2 min to complete
• Tools: Web Browser
• Difficulty: Simple
• ≈ 5 instructions

1. 1

   Download

   Download the script file by clicking on the   Apply protection  button above.
   Use   Undo protection button above to restore changes.
2. 2

   Keep the file

   If warned by your browser, keep the file.
3. 3

   Open

   Open the downloaded file.
4. 4

   Exit

   Once it's done, press any key to exit the window.
5. 5

   Restart

   Restart your computer for all changes to take effect.

Apply with privacy.sexy

Guided, automated application with safety checks

• Recommended for most users
• Includes safety checks
• Free
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Help

How to apply or restore "Mitigate Spectre Variant 2 and Meltdown in host operating system" using privacy.sexy

• ≈ 3 min to complete
• Tools: privacy.sexy
• Difficulty: Simple
• ≈ 4 instructions

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

1. 1

   Open or download

   Open or download the desktop application
2. 2

   Choose script

   1. Search for the script name: Mitigate Spectre Variant 2 and Meltdown in host operating system
   2. Check the script by clicking on the checkbox.
3. 3

   Run

   Click on ▶️ Run button at the bottom of the page.

   This button only appears on desktop version (recommended). On browser, use 💾 Save button.

Run commands

Copy and run commands manually Requires technical knowledge

Apply

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"

Revert

Restore changes

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Help

How to apply or restore "Mitigate Spectre Variant 2 and Meltdown in host operating system" using commands

• ≈ 2 min to complete
• Tools: Command Prompt
• Difficulty: Medium
• ≈ 3 instructions

View step-by-step guide with screenshots

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1. 1

   Open Command Prompt

   Open Command Prompt as Administrator.
2. 2

   Copy code

   Copy the code:

   Copy Apply Code Copy Revert Code
3. 3

   Paste & run

   Paste the commands into Command Prompt and press Enter to run.

   Some changes require a system restart to take effect

Similar Guides

Wider Goal

Guides below includes this guide to achieve a wider goal.See other more general settings that includes this one as one of its actions.
These plans combine multiple privacy settings, including this one, for stronger protection.

Enable protection against Meltdown and Spectre

Visit category page

Security improvements

This category encompasses a range of scripts designed to improve the security of your system by enforcing security best practices. These scripts help pro...

— Security improvements

Same Goal

Another guide in Enable protection against Meltdown and Spectre See settings that are in the same category as this guide.
Using other actions in the same category may help you achieve your goal better.

Mitigate Spectre Variant 2 and Meltdown in Hyper-V

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About the Creators

These people have authored this documentation and written its scripts:

• 

  undergroundwires

  • Certified security professional
  • 7+ years experience securing banks
  • Open-source developer since 2005
  • EU advisor, Public Speaker, Moderator
• Open-Source Contributors

  • Hundreds across the globe
  • Testers, reviewers, developers
  • Companies, military agencies
  • Community since 2017

About Us

Reviewed By

This guide has undergone comprehensive auditing and peer review:

• Expert review by undergroundwires

  • Verified technical accuracy and editorial standards
  • Assessed system impact and user privacy risks
  • Audited and verified using automated security tests

• Public review by large community

  • Privacy enthusiasts and professionals peer-reviewed
  • Millions of end-users tested across different environments
  • Audited and verified using third-party security software

History

We continually monitor our guides, their impact and other potential privacy options. We update our guides when new information becomes available. On every update, we publicly store who made the change, what has been changed, why the change was made and when the change was made.

Review Change History Our Change Process