How to Permanently Disable Windows Security on Windows 11

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Countless users have found themselves frustrated over Microsoft's built-in Windows Security—or "Windows Defender Antivirus"—while working on Windows 11. It’s labeled as your PC's guardian angel, designed to ensure your system remains as pristine and virus-free as a glass-clean room at a data center. But sometimes, even angels can overstep boundaries! Users have reported grievances about "false alarms," "performance bottlenecks," and a host of other inconveniences. So, the logical question pops up: can you permanently get rid of this digital big brother?
Well, as per a tutorial from DigitBin, yes, it's possible. But this isn’t one of those carefree DIY projects you’d tackle over coffee. You need to navigate folders, poke your nose into the Windows Registry, use Group Policy hacks, and proceed with caution because missteps could lead to security vulnerabilities—or, worst case—a non-functional OS. Let’s break this down for you!

Why Would Someone Want to Remove Windows Security?

Windows Security brings robust protection to your Windows 11 system. However, as much as we appreciate the concept of a vigilant antivirus, here’s why some users consider giving it the boot:

1. Performance Issues

Windows Security performs real-time scans, constant system monitoring, and background service runs that can hog CPU and memory resources. For users running older PCs—or trying to eke out every ounce of performance for gaming and rendering tasks—this can be a dealbreaker. Who wants their PC lagging in the middle of a firefight just because Defender decided it was time for a scan?

2. False Alarms & Overzealous Protection

Many users report frustration over Windows Security flagging legitimate files or software as harmful. This isn't a mere popup nuisance; sometimes important files get automatically quarantined or deleted. Such hyper-vigilance might make users long for an unmonitored ecosystem where external antivirus software or manual oversight suffices.
Warning: Permanently disabling—or worse, removing Windows Security entirely—leaves your machine unprotected. You'll need an alternative antivirus solution in place to prevent malware disasters.

Before You Start: Understand the Risks

It's crucial to acknowledge that removing Windows Security isn't a casual tweak like rearranging desktop icons. If you don’t replace it with another antivirus or robust security base:
  • You’re leaving your system open to malware, ransomware, phishing attacks, and more.
  • You'll lose features like advanced ransomware protection, SmartScreen filtering, and parental controls.
Imagine removing the seatbelt from your car: sure, it stops the annoying beep, but at what cost when disaster strikes?

Steps to Permanently Disable Windows Security

Depending on your comfort level with technical systems, these three methods can help you disable or remove Windows Security. But keep this in mind—Windows Security can be stubborn, and even "permanent removal" may leave lingering remnants like the shield icon in your taskbar.

1. Disable Real-Time & Tamper Protection

This is the first step—a sort of onboarding process—before diving into practices like Registry modifications. Here's how:
  • Open Settings using Windows + I.
  • Navigate to Privacy & Security > Windows Security.
  • Under Virus & Threat Protection, click Manage Settings.
  • Turn off Real-time Protection (this stops active scans).
  • Scroll down and disable Tamper Protection.
Disabling "Tamper Protection" allows changes through advanced tools like Group Policy Editor.
Tip: Disabling these settings removes the "active guardian," but doesn’t uninstall the app. This keeps your system vulnerable unless precautions are taken.

2. Using the Windows Registry Editor

The Windows Registry is like the DNA of your operating system. Altering it means tinkering with critical aspects of Windows functionality.
Follow these steps (carefully, and always create a backup first!):
  • Press Windows + R to open the Run Dialog Box, type regedit, and hit Enter.
  • Navigate to:
    HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender
  • Create a new DWORD value:
  • Right-click on the blank area of the right pane.
  • Select New > DWORD (32-bit) Value.
  • Name it DisableAntiSpyware.
  • Double-click it and set its value to 1.
  • Restart your PC to apply changes.
This disables most antivirus functions, but note—it doesn't prepare your system for external attacks. Consider having an alternative antivirus app ready.

3. Use the Local Group Policy Editor

Group Policy is a powerhouse of centralized configurations for Windows. To permanently turn off Windows Security:
  • Open Run Dialog Box (Windows + R), type gpedit.msc, and hit Enter.
  • Navigate to:
    Computer Configuration > Administrative Templates > Windows Components > Microsoft Defender Antivirus
  • Enable the policy:
  • Double-click Turn Off Microsoft Defender Antivirus.
  • Select Enabled, apply, and click OK.
  • Restart your system.
Note: This disables ongoing antivirus services but doesn’t remove the app itself. Also, Group Policy Editor is unavailable on Windows 11 Home Edition, but it works on Pro/Enterprise versions.

Can You Fully Remove Windows Security?

The methods above disable it but don't obliterate its traces entirely. Why? Windows integrates its security tools too deeply into the OS to let go entirely. Even if disabled, remnants like the taskbar shield icon stubbornly persist because they are necessary for certain subsystems.
Complete (and risky) removal may require heavy reliance on third-party scripts or unofficial tools, which are frowned upon since they often pave the way for system instability or outright breakdowns during updates.

What to Do After Removing Windows Security?

Once you've disabled Defender, you lose a firewall, real-time scans, virus definitions, and ransomware protection. Here are safe alternatives:
  • Install Another Antivirus: Solutions like Avast, Bitdefender, or Norton can fill the void.
  • Sandboxes: Virtualize apps to run them in isolation. Tools like Sandboxie Plus help avoid security nightmares.
  • Be Hyper-Vigilant Online: Think twice before downloading sketchy files or visiting murky websites.

The Final Verdict

Disabling or removing Windows Security is like asking Windows to operate without its dependable babysitter. If you're confident in managing your own system's cybersecurity landscape, the steps above can help ease Defender's grip over your PC. However, always weigh the pros and cons: is slightly better performance or an escape from false alarms worth weakening your computer’s defenses?
If you're determined to go ahead, proceed cautiously and consider installing robust third-party antivirus software before taking the plunge. After all, a vulnerable PC is just a bad email attachment or malicious link away from a catastrophic crash—and you're not going to blame Windows Security after it's gone, right?

Source: DigitBin How to Remove Windows Security Permanently on Windows 11