In an email we received from Janet D., she shared her recent unsettling experience. Here’s what she described: "I received a pop-up that froze my computer and read, ‘Access to this system is blocked ...

Q: Are Windows Defender warnings that pop up with a phone number legit? A: Microsoft’s built-in security tool has improved over the years, and it still blocks plenty of everyday threats. But the ...

A security vulnerability was recently discovered in Microsoft Defender, the first-party Windows 11 antivirus tool used by millions. Attackers can exploit this vulnerability to gain elevated system ...

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

Tech expert Kurt "CyberGuy" Knutsson says a tech support scam used a fake Windows Defender pop-up, tricking the victim to call and download software.