Windows Security review
A free Windows-native security suite covering malware, ransomware, networks, and device controls.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Windows Security is a free security app integrated into Windows 10 and Windows 11. It is intended for people who want built-in protection across malware scanning, unsafe apps and downloads, network filtering, ransomware controls, and device security. Microsoft Defender Antivirus provides quick, full, custom, and offline scans, along with real-time protection for files and programs. The app also brings these capabilities together in a security-status dashboard covering device health and account protection.
Its strongest point is the breadth of protection included within the Windows environment. Windows Firewall supports network filtering and network-profile management, while SmartScreen covers apps, files, websites, and downloads. Controlled folder access provides ransomware protection, and Protection history records Defender actions and removed potentially unwanted apps. Device-security controls include core isolation, TPM, and Secure Boot. Together, these features give Windows users a wide set of security controls without requiring a separate antivirus purchase.
Windows Security is the clearest fit for users running Windows 10 or Windows 11 who want free, integrated protection and direct access to Windows security settings. Its main boundary is platform coverage: the product is documented for Windows 10 and Windows 11, so it is not suited to households or teams seeking one security product across other operating systems. Choose it for Windows-native malware, ransomware, network, app, and device protection; consider an alternative when broader platform coverage is a requirement.
Windows Security pros and cons
- Where it wins
- Free protection built into Windows 10 and Windows 11
- Combines Defender, Firewall, SmartScreen, and ransomware controls
- Includes offline scans, protection history, and device-security settings
- Where it doesn't
- Supports Windows 10 and Windows 11 only
- Its coverage is centered on the Windows security ecosystem
- Not intended for devices outside supported Windows versions
Windows Security fact sheet, pricing and score →
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update