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Windows Security Center

Critical security updates and vulnerability alerts

11:12 AM

Frequently Asked Questions

Patch Tuesday is Microsoft's monthly security update release, occurring on the second Tuesday of each month, delivering critical security patches and cumulative updates.

Enable automatic updates, use Windows Defender, keep third-party software updated, enable firewall protection, and follow our security news for zero-day alerts.

Zero-day vulnerabilities are security flaws unknown to the vendor that are actively exploited. We provide immediate coverage when these are discovered or patched.