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.

Oct 14, 2025 · In Windows, use Search on the taskbar to search for PC Health Check, then select it from the list of results. If a PC Health Check update is available, you can quickly install it for the latest …

This article contains lists of tools and resources that Microsoft makes available to help you understand how to avoid or remove malware and viruses from your Windows-based computer.

Learn how to check for the latest Windows Updates and install them to keep your device running smoothly and securely.

One of the key benefits of the Windows Security app is its ability to provide real-time protection. Microsoft Defender Antivirus continuously scans your device for potential threats and takes …

Learn how to use virus and threat protection options in Windows Security to scan your device for threats and view the results.

Learn how to use a health report in Windows Security to manage your device performance and keep your device secure.

Learn how to run System File Checker in Windows to check if your computer has problems with files.

Microsoft Defender's real-time anti-malware protection runs whenever your device is on, keeping an eye out for malicious activity. Microsoft Defender will also run quick scans of your device on a daily basis, …

Feb 4, 2025 · Before installing Windows 11, make sure the device where Windows 11 is being installed meets the minimum system requirements. If the device is currently running Windows 10, Microsoft …