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.

Sep 5, 2024 · Learn how to protect your computer by running a full system scan on Windows 10. Follow our step-by-step guide to ensure your PC is free from malware and threats.

Sep 5, 2024 · Here's how to completely and correctly scan for viruses and other malicious software like Trojan horses, rootkits, spyware, adware, worms, etc.

May 30, 2025 · How to scan your device for malware Windows 11/10. Simple steps to run malware scan, check computer for threats, and protect your system from harmful attacks.

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 …

Apr 15, 2025 · Open the Start Menu and search for Windows Security. Click on Virus & Threat Protection. Locate and click the Quick scan button under the Current threats section. This …

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

Oct 21, 2025 · From your very first scan to setting up regularly scheduled scans that keep your computer clean, you’ll learn it all here. Let’s get started. Aside from your computer, you’ll only …

Keep all your devices safe with real-time online protection and frequent virus scanning. Learn more! How do I run a free virus scan?

Nov 26, 2024 · Running a full system scan on Windows 11 will help identify and eliminate any hidden threats on your computer. Follow these steps to thoroughly scan your entire system.