A patch Microsoft released on Wednesday to fix a zero-day vulnerability in its Defender security engine may cause Windows ...

All Windows PCs come with a built-in security feature called Windows Defender Application Control (WDAC), which helps prevent unauthorized software from running by allowing only trusted applications.

CISA says ransomware gangs are exploiting Microsoft Defender’s BlueHammer flaw, patched in April 2026 after zero-day reports.

Microsoft has released the July 2024 preview update for Windows 10, version 22H2, with fixes for Windows Defender Application Control (WDAC) issues causing app crashes and system memory exhaustion.

Microsoft Defender offers great protection from malware -- but there are other online threats you might want to consider, too.