Microsoft rolls out Windows 11 updates and 26H2 evaluation ISOs

Microsoft is rolling out updates for Windows 11, including the October 2026 cumulative update (KB5124010) for versions 24H2 and 25H2. This update includes security fixes and various functional improvements. Users can utilize the open-source command-line tool ViVeTool to manually enable specific feature flags that Microsoft has prepared within the Windows core but has not yet released to all users via its controlled feature rollout process.

Additionally, evaluation ISOs for Windows 11 26H2 Enterprise have become available for testing. These evaluation versions allow for a 90-day trial period. The release of these ISOs suggests that version 26H2 is approaching general availability, with build 26300.9457 identified as a likely candidate for the official release.