This guide explains how to protect your Windows PC from viruses, malware, ransomware, and other online threats. It is written in clear, simple steps and uses only Windows built-in tools unless otherwise noted.

1. What Threats You Are Protecting Against

• Viruses: Programs that spread and damage files or system functions.
• Malware: Harmful software including spyware, adware, keyloggers, and trojans.
• Ransomware: Locks or encrypts your files and demands payment.
• Potentially Unwanted Apps (PUA): Programs that slow your system or show unwanted ads.
• Phishing: Fake emails or websites designed to steal passwords or personal info.

2. Use Windows Security for Core Protection

Windows Security is built into Windows 10 and Windows 11. It provides real-time protection, scanning, ransomware protection, and security updates.

Open Windows Security

Click Start, type Windows Security, and open the app.

Key Sections

Current Threats

• Shows active threats or recent detections.
• Run a Quick Scan for fast checking.
• Use Full Scan or Custom Scan for deeper checks.

Virus and Threat Protection Settings

• Real-time protection should always be ON.
• Cloud-delivered protection should be ON.
• Automatic sample submission should be ON.
• Exclusions should only be used for trusted files.

Protection Updates

• Security intelligence updates keep Windows aware of new threats.
• Click Check for updates to confirm you are current.

3. Ransomware Protection

Windows includes Controlled Folder Access to block unknown apps from changing files in protected folders.

• Open Windows Security.
• Select Virus and Threat Protection.
• Select Manage Ransomware Protection.
• Turn on Controlled Folder Access.

You can also connect OneDrive for file recovery if ransomware occurs.

4. Signs Your PC May Be Infected

• Slow performance or freezing.
• Unexpected pop-ups or ads.
• Browser redirects to unknown pages.
• Programs opening or closing on their own.
• Security tools disabled without your action.

5. What To Do If You Suspect Infection

• Run a Full Scan in Windows Security.
• Disconnect from the internet if ransomware is suspected.
• Remove unknown programs from Apps and Features.
• Check browser extensions for anything unfamiliar.
• Restart the PC and run another scan.

6. Preventing Future Threats

• Keep Windows Update turned on.
• Do not open email attachments from unknown senders.
• Avoid downloading software from untrusted websites.
• Use strong, unique passwords.
• Enable two-factor authentication where possible.
• Back up important files regularly.

7. When To Contact M-Tech Support

Contact us if:

• Threats keep returning after removal.
• The PC is locked by ransomware.
• Windows Security will not open or stays disabled.
• You need help restoring files or cleaning the system.

We are here to help you keep your system safe and running at peak performance.