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How to remove virus warning your computer is infected?

Published in Cybersecurity Warnings 4 mins read

Fake virus warnings that claim "Your computer is infected" are typically browser-based scams designed to scare you into taking harmful actions, like calling a fraudulent tech support number or downloading malicious software. The key is to recognize these as deceptive alerts and take appropriate steps to secure your device.

Here's how to address and remove these types of warnings:

Step 1: Immediately Exit Your Browser

When a fake virus warning appears, it often tries to prevent you from closing the browser normally.

  • Do NOT click any buttons or links on the pop-up. This includes "Close," "OK," "Remove Virus," or "Call Support." Clicking these can lead to further issues.
  • Force-quit your browser:
    • On Windows: Press Ctrl + Shift + Esc to open Task Manager. Find your browser (e.g., Chrome, Firefox, Edge), select it, and click "End task."
    • On Mac: Press Cmd + Option + Esc to open the "Force Quit Applications" window. Select your browser and click "Force Quit."
    • If you can't access Task Manager/Force Quit, restart your computer. When it restarts, avoid reopening the browser if it attempts to restore previous sessions.

Step 2: Remove Any Suspicious Apps or Extensions

After successfully closing your browser, the next step is to eliminate any potentially unwanted programs or browser extensions that might be causing these pop-ups.

  • Check Browser Extensions:
    • Open your browser settings (look for three dots or lines in the top right corner).
    • Navigate to "Extensions" or "Add-ons."
    • Review the list for any extensions you don't recognize or didn't intentionally install. These might be disguised as helpful tools.
    • Remove any suspicious extensions.
  • Uninstall Suspicious Programs (Windows):
    • Go to "Settings" > "Apps" > "Apps & features."
    • Review the list of installed programs, looking for anything recently installed that you don't remember, or programs with unusual names.
    • Select the suspicious program and click "Uninstall."
  • Uninstall Suspicious Programs (Mac):
    • Open "Finder" > "Applications."
    • Look for any unfamiliar applications.
    • Drag suspicious apps to the Trash and then empty the Trash.

Step 3: Scan Your Device for Malware

Even if the initial warning was fake, the presence of such pop-ups can indicate that adware or other low-level malware is present on your system. A thorough scan is crucial.

  • Use reputable antivirus/anti-malware software: If you have security software installed, ensure it's up to date and run a full system scan.
  • Consider a second opinion scanner: Tools from reputable security vendors can sometimes catch things your primary antivirus might miss.
  • Follow the scan's recommendations: If malware is detected, quarantine or remove it as advised by the security software.

Step 4: Perform a Factory Reset (Last Resort)

If all previous steps fail and you continue to experience persistent fake virus warnings or other severe system issues, a factory reset might be necessary. This will wipe your drive and reinstall the operating system, ensuring a clean slate.

  • Back up your data: Before performing a factory reset, ensure all important files, photos, and documents are backed up to an external hard drive or cloud storage. A factory reset will erase everything on your computer.
  • Proceed with the reset: Follow your operating system's instructions for a factory reset. This can usually be found in the system settings under "Recovery" or "Reset."

How to Identify a Fake Virus Warning

Understanding the characteristics of fake alerts can help you avoid falling victim to them in the future.

Characteristic Legitimate Antivirus Alert Fake Virus Alert (Scareware/Adware)
Source From your installed antivirus software or OS Browser pop-up, new tab, full-screen takeover
Appearance Professional, integrated with system UI Unprofessional, low-resolution, flashing banners
Language Clear, factual, no emotional manipulation Urgent, threatening, "IMMEDIATE ACTION REQUIRED!"
Call to Action Scan, quarantine, remove, update Call a phone number, click a suspicious link, pay
Difficulty to Close Easy to close or dismiss Difficult to close, persistent, multiple pop-ups

Prevention is Key

  • Keep software updated: Regularly update your operating system, web browsers, and all software, especially your antivirus program.
  • Use an ad blocker: Browser extensions that block ads can prevent many malicious pop-ups from appearing in the first place.
  • Be cautious online:
    • Avoid clicking on suspicious links in emails, social media, or unfamiliar websites.
    • Download software only from official and trusted sources.
    • Be wary of unsolicited phone calls or messages claiming to be tech support. Legitimate companies will not cold-call you to inform you of a virus.
  • Regular backups: Maintain regular backups of your important data, so you can recover quickly in case of a severe infection or system compromise.

By following these steps, you can effectively remove fake virus warnings and enhance your device's security.