How to Tell If Your Computer Has a Virus (And What to Do About It)

Computer viruses and malware are more sophisticated than ever in 2026. Here's how to identify an infection and remove it safely.

Warning Signs Your Computer Is Infected

1. Unexpected pop-ups — especially ones claiming your computer is infected (ironic, right?)
2. Dramatically slower performance — malware uses your CPU and RAM
3. Programs you didn't install — check your installed programs list
4. Browser redirects — your searches go to strange websites
5. Disabled antivirus — some malware disables Windows Defender
6. High network usage — malware often communicates with remote servers
7. Ransom messages — ransomware encrypts your files and demands payment

Step-by-Step Virus Removal

Step 1: Disconnect from the Internet This prevents the malware from spreading or communicating with its server.

Step 2: Boot into Safe Mode Restart and hold Shift while clicking Restart. Go to Troubleshoot → Advanced → Startup Settings → Safe Mode with Networking.

Step 3: Run a Full Scan Use Windows Defender or download Malwarebytes (free version) and run a full system scan. Let it quarantine everything it finds.

Step 4: Check Your Browser Reset your browser settings to default. Remove any extensions you didn't install. Clear your cache and cookies.

Step 5: Update Everything After cleaning, update Windows, your browser, and all software. Vulnerabilities in outdated software are how most malware gets in.

When to Call a Professional

If you see ransomware, if your files are encrypted, or if the malware keeps coming back after removal — call a professional. Don't pay ransom demands. NeighborTechs has recovered data from ransomware attacks and deeply embedded rootkits. Call (804) 408-8090.