If you suspect that your device may have malware you should have Microsoft Defender run a scan. Here's how to do that on Windows, Mac, or Android.

Get the world’s largest threat-detection network and machine-learning malware protection in a single, lightweight malware scan and removal tool — 100% free.

Free scan to see if your Windows or Mac get infected. Detect and remove viruses, malware, spyware, and other malicious threats.

Analyse suspicious files, domains, IPs and URLs to detect malware and other breaches, automatically share them with the security community.

Nov 2, 2025 · Learn how to scan and remove computer viruses using trusted antivirus software options, find free online virus scanners, and safeguard your system from threats.

F‑Secure Online Scanner finds and removes viruses, malware and spyware on your Windows PC. Run a virus scan for free!

Dec 21, 2025 · Wondering how to scan computer for viruses? Our step-by-step guide shows you how to detect and remove threats fast using built-in tools and advanced methods. Scan your PC now!

Get a free one-time online virus scan, or a free 30-day trial with unlimited virus scans from ESET. Our online virus scanner will help you identify and remove malware.

Oct 21, 2025 · Learn how to run antivirus scans efficiently with TotalAV, Surfshark, and Norton, including quick, full, and custom scans for Windows, Mac, and Android.