hotpatch program

The hotpatch program is Microsoft's restartless servicing model for eligible Windows systems, delivering security updates without requiring a reboot. A March 2026 out-of-band hotpatch fixed remote network-service vulnerabilities in the Windows Routing and Remote Access Service (RRAS) management tool, highlighting the program's value for enterprise environments where minimizing downtime is critical. Devices enrolled in the hotpatch program receive these restartless packages automatically, reducing operational disruption while maintaining security posture. The program is designed for specific Windows editions and configurations, making it a targeted solution for organizations that prioritize availability alongside patch compliance.