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Security updates, explained.
Patch Tuesday is the day Microsoft releases its regular monthly security updates. You do not need to install every update blindly, but delaying important fixes can leave known openings for attackers.
For home users
Turn on automatic Windows updates and restart when prompted. Back up important files.
For businesses
Test updates quickly, then deploy them in controlled groups. Track failures and exceptions.
For administrators
Prioritize actively exploited vulnerabilities, exposed systems, identity services, and browsers.
SEPTEMBER 2026
This month's priority
Microsoft's September release includes two vulnerabilities reported as actively exploited. Systems exposed to the internet and computers handling valuable credentials should be addressed first.
1Back up firstConfirm important data and recovery options are available.
2Install updatesUse Windows Update or your organization's approved management system.
3RestartSome protections do not take effect until the device restarts.
4VerifyConfirm updates succeeded and important applications still work.