Hotpatch promised four reboots a year. 2026 has asked for eight
Microsoft published advisory MC1527979 yesterday: the November and December 2026 security updates require a restart on hotpatch-enabled Windows Server 2022. With that, the official calendar for the year closes at eight months with a reboot and four without — the exact inverse of what the feature sells. The month-by-month count from Microsoft's own table, the unplanned-baseline clause that has been published for years, why Windows Server 2025 does keep November and December, the three things hotpatch never covered, and the question that actually matters: what a reboot costs in your infrastructure.
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