in-memory updates

In-memory updates, also known as hotpatching, are a Microsoft enterprise technology that applies security fixes to running Windows systems without requiring a reboot. This approach delivers smaller update payloads—often an order of magnitude smaller than traditional cumulative updates—enabling faster downloads, lower network impact, and quicker compliance for managed fleets. Initially available on Azure, hotpatching has expanded to Windows Server 2025 on-premises deployments and Windows 11 Enterprise/Education version 24H2. IT administrators benefit from reduced downtime and simplified update workflows, though some editions and configurations may have limitations. The tag covers discussions on how in-memory updates work, their deployment benefits, and their role in modern enterprise IT management.