IT Security

10 Signs Your Computer Has a Virus

June 13, 2026 2 min read

Computer viruses can cause serious damage before you even realize they are there. Here are 10 signs that your computer might be infected.

1. Slow Performance

If your computer suddenly runs much slower than usual, malware may be running in the background consuming resources.

2. Pop-Up Ads

Unexpected pop-up ads, especially ones that appear when you are not browsing the web, are a classic sign of adware or malware infection.

3. Browser Redirects

If clicking links takes you to unexpected websites, your browser may be hijacked by malware.

4. Unknown Programs

Programs you never installed appearing on your computer is a red flag. Check your installed programs list regularly.

5. Disabled Security Software

Malware often disables antivirus programs to avoid detection. If your security software won’t turn on, you may be infected.

6. Missing Files

Files disappearing or being modified without your action could indicate a virus or ransomware infection.

7. High Network Activity

If your internet activity light is blinking constantly when you are not doing anything online, malware may be communicating with external servers.

8. Crashing and Freezing

Frequent crashes, blue screens, or programs freezing can be caused by malware damaging system files.

9. Unusual Error Messages

Strange error messages or system messages you have never seen before can indicate infection.

10. Email from You That You Did Not Send

If friends report receiving emails from you that you did not send, your email account or computer may be compromised.

What to Do If You Suspect a Virus

  • Boot into Safe Mode
  • Run a full scan with Windows Security
  • Download and run Malwarebytes
  • Check your browser for unknown extensions
  • Contact a professional if you cannot remove it

Need Professional Help?

Contact Coweta Computers for virus removal services in Newnan, GA.

Phone: (770) 253-3475

Email: info@cowetacomputers.com