How to Tell If You Have a Computer Virus

If your computer is acting strange, you might have a virus or malware. The tricky part? Modern malware is designed to be invisible. But there are usually signs — and knowing what to look for can help you catch an infection before it does real damage.

Here are the warning signs we see every day at North Ridgeville Computer Services.

1. Random Pop-Ups

Pop-ups appearing when you're just using your computer — not even browsing — is a big red flag. Legitimate software doesn't throw random ads at you. If pop-ups are showing up on your desktop, in your browser when you open it, or when you click links, you probably have adware or malware.

2. Browser Redirects

You type google.com and end up somewhere else. You click a search result and it takes you to a different site than the one listed. Your home page changed without your permission. These are classic signs of browser hijacker malware.

3. New Toolbars or Extensions

Open your browser and check your extensions. Anything there you don't remember installing? That's probably malware that came bundled with other software.

4. Computer Is Suddenly Much Slower

Malware uses resources. Cryptojackers use your CPU to mine cryptocurrency. Spyware uses bandwidth sending your data elsewhere. If your previously-fast computer is suddenly sluggish for no reason, that's worth investigating.

5. Programs Crashing or Not Opening

Malware often interferes with legitimate programs, especially antivirus software. If your antivirus is suddenly disabled or won't update, that's almost certainly malware actively fighting against it.

6. Friends Getting Strange Emails From You

"Hey I got a weird email from you — did you send this?" If friends or family are asking this, your email account is compromised. This often happens alongside a computer infection but can also happen on its own (from a leaked password).

7. Fake Virus Warnings or "Microsoft" Pop-Ups

A pop-up appears saying your computer is infected and you need to call a number. These are ALWAYS scams. Microsoft and Apple never put phone numbers in pop-ups. If you see these, you have adware or malware generating them — and if you call the number, scammers will try to steal from you.

8. Files Encrypted or Renamed

If you open a folder and your files have strange extensions like .locked, .encrypted, or .crypto — you have ransomware. This is serious. Turn off your computer and call us immediately.

9. Unknown Programs Running

Press Ctrl+Shift+Esc to open Task Manager. Look at the processes. See anything weird using a lot of CPU or memory? That could be malware. (Be careful though — lots of legitimate programs have weird names.)

10. Your Webcam Light Turns On By Itself

This one is creepy but real. Some spyware activates webcams to watch users. If your webcam light is on when you didn't open a camera app, that's a serious red flag.

What to Do If You Have a Virus

Don't panic, but act quickly:

• Disconnect from the internet to prevent further damage or data theft
• Don't log into banking or sensitive accounts until the computer is clean
• Don't rely on one quick antivirus scan — modern malware hides from basic scans
• Call us at (440) 693-6363 for a free virus checkup

How to Avoid Viruses in the Future

• Keep Windows, your browser, and antivirus updated
• Don't download software from sketchy sites
• Don't click pop-ups — especially ones that tell you to call a number
• Don't open unexpected email attachments
• Use a good antivirus (we can recommend ones)
• Back up your files regularly (so ransomware can't hold you hostage)

Think you have a virus? We offer free virus checkups for North Ridgeville residents. Call (440) 693-6363.