Malware - What it is, common signs, and how to remove it safely

Malware

What it is

Malware is any software made to harm your device or data. It can steal passwords, lock your files, spy on activity, or hijack your browser. For a quick primer and examples, see our malware explainer.

How it spreads

  • Phishing emails and fake attachments

  • “Free” repacks, cracks, and shady download sites

  • Malicious ads and fake update prompts

  • Exploits against outdated apps or plugins

What you may notice

  • Pop-ups, redirects, or a homepage you didn’t set

  • Slower performance, high CPU or fan noise when idle

  • New toolbars, extensions, or programs you don’t remember installing

  • Security tools crash or won’t update

Remove it now

  1. Disconnect from the internet.

  2. Run a full anti-malware scan, reboot, then scan again.

  3. Remove unknown startup items, tasks, services, and extensions.

  4. From a clean device, change passwords and turn on MFA.

  5. Check bank and email accounts for unusual activity.

Prevent it

  • Install software only from official sources and avoid cracks.

  • Keep your OS, browser, and apps updated.

  • Use reputable EDR or anti-malware plus DNS/web filtering.

  • Block macros by default and verify invoices or links out of band.

  • Use a password manager and MFA on important accounts.

    Glossary (A–Z)

    All A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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