For most people using a supported and fully updated Windows 11 computer, yes: Microsoft Defender Antivirus and the other protections inside Windows Security are sufficient as the primary antivirus.

Learn how BitLocker, passkeys, Microsoft Defender, and other Windows 11 security features protect your data, accounts, apps, and devices.

A patch Microsoft released on Wednesday to fix a zero-day vulnerability in its Defender security engine may cause Windows machines to write files large enough to completely consume available disk ...

At times, you may not be able to turn Real-time protection on or off in Windows Defender on Windows 11. There could be many reasons for this error, so we have compiled some common causes along with ...

Microsoft on Wednesday morning issued an emergency update to its Microsoft Malware Protection Engine, closing CVE-2026-50656 — the Windows Defender privilege-escalation flaw known as RoguePlanet — 29 ...

Try the following suggestions to fix the Random Disk Usage Spike issue in Windows 11/10 computers: 1] Upgrade to the latest Windows version or build First and foremost, check the version of Windows ...

Microsoft Defender engine 1.1.26060.3008 patches a critical SYSTEM privilege flaw but may expose Windows 11 to a new disk ...

Last month, security researcher Chaotic Eclipse (better known as Nightmare-Eclipse) managed to bypass Windows 11's sophisticated BitLocker security feature using a USB stick. Nightmare claimed that ...

Threat actors compromised AsyncAPI packages and weaponized trusted CI/CD workflows to distribute malware through npm. This ...

From malware detection and removal tools to real-time analytics and cloud-enabled protection, Microsoft Defender offers all these benefits to its users at no extra cost. To use it, just get the app ...

Microsoft fixed 570 flaws in its biggest-ever Patch Tuesday using AI, offering New Zealand's understaffed security teams real proof of how AI can help.

A ransomware operation that emerged barely 19 months ago has claimed 91 victims — 11 of them in June 2026 alone — by exploiting a critical pre-authentication vulnerability in Citrix NetScaler ...