How to Remove Malware from Windows 11 (Step-by-Step Guide)

If your PC is slow, showing pop-ups, or acting strange, you might be infected. The good news is you can remove malware from Windows 11 without paying for expensive software. This free, step-by-step guide will help you clean your PC and protect it from future threats.

Audience: Windows 11 users in the United States
Last Updated: 2026

What Is Malware?

Malware is any harmful software designed to:

• Steal personal data
• Slow down your PC
• Show unwanted ads
• Spy on you
• Damage your system

Common types:

• Viruses
• Trojans
• Spyware
• Ransomware
• Adware

Signs Your Windows 11 PC Has Malware

You may have malware if:

• Your PC is suddenly very slow
• Pop-up ads appear
• Browser redirects happen
• Unknown apps appear
• Windows crashes
• Antivirus is disabled

If you see these, it’s time to clean your PC.

Step 1: Disconnect From the Internet

Turn off Wi-Fi or unplug Ethernet.

This stops malware from:

• Sending data
• Downloading more viruses
• Spreading

Step 2: Restart in Safe Mode

Safe Mode prevents most malware from running.

1. Settings → System → Recovery
2. Click Restart now under Advanced startup
3. On Boot Screen, Choose Troubleshoot → Advanced → Startup Settings → Restart
4. Select Safe Mode

Step 3: Run Windows Defender Full Scan

Windows 11 has a powerful built-in antivirus.

1. Open Windows Security
2. Click Virus & threat protection
3. Click Scan options
4. Select Full Scan
5. Click Scan now

This may take 30–60 minutes.

Step 4: Run Windows Security Offline Scan

This removes deep hidden malware.

1. Windows Security → Virus & threat protection
2. Scan options
3. Select Windows Security Offline scan
4. Click Scan

Your PC will restart and clean malware.

Step 5: Remove Suspicious Programs

1. Settings → Apps → Installed Apps
2. Uninstall anything you don’t recognize

Look for:

• Toolbars
• Fake cleaners
• Random software names

Step 6: Reset Your Browser

Malware often hides in browsers.

For Chrome:

Settings → Reset settings → Restore settings to default

For Edge:

Settings → Reset settings → Restore settings

Also Read: How to reset Windows without losing Data.

Step 7: Delete Temporary Files

1. Settings → System → Storage
2. Click Temporary files
3. Select all
4. Click Remove

This deletes malware leftovers.

Step 8: Update Windows 11

Windows updates patch security holes.

Settings → Windows Update → Check for updates

Step 9: Turn On All Security Features

Go to Windows Security and enable:

• Real-time protection
• Firewall
• Cloud protection
• Tamper protection

How to Prevent Malware in the Future

• Don’t download cracked software
• Avoid unknown websites
• Use antivirus
• Keep Windows updated
• Use strong passwords

Step 10: Install a Second-Opinion Scanner (Optional)

For extra safety, use a free scanner like:

• Malwarebytes Free
• AdwCleaner

Run it once to confirm your PC is clean.

Also Read: Best free Software Every Windows 11 user must have

Final Thoughts

You can safely remove malware from Windows 11 using built-in tools without spending money. Windows Defender is powerful enough for most users.

👉 Best Tip:
Run a full scan once every week.

Recommended Tools: Bitdefender | Norton | Malwarebytes

FAQs – Remove Malware from Windows 11