Windows 10 Support Ended: 2026 Migration and ESU Guide for Businesses

Windows 10 reached end of support on October 14, 2025. Devices still run, but standard technical support and monthly security servicing ended for the affected editions. Businesses should now be executing a migration or a documented Extended Security Updates bridge.

Establish the current inventory

• Windows edition, version, build, and hardware model.
• Windows 11 compatibility and firmware prerequisites.
• Business applications, drivers, peripherals, and local data.
• Security, management, backup, and remote-support agents.
• Owner, location, criticality, and replacement path.

Choose upgrade, replacement, or ESU

Compatible devices may move to Windows 11 after application and hardware validation. Incompatible or aging devices may need replacement. Eligible commercial devices can use ESU to receive defined security updates while migration finishes, but ESU does not add features or eliminate third-party support constraints.

Understand the dates precisely

Standard Windows 10 support ended October 14, 2025. Microsoft’s lifecycle FAQ lists October 13, 2026 as the end of ESU Year 1 for eligible commercial editions, followed by later commercial ESU years. Record the edition and program actually purchased instead of using one date for every scenario.

Execute a controlled migration

1. Pilot representative applications and devices.
2. Back up and verify recovery.
3. Schedule users and business units in waves.
4. Confirm management, endpoint security, encryption, and patching after cutover.
5. Retire or sanitize old devices and close exceptions.

Next step for your environment

Publish a device-level migration register with owner, path, deadline, exception, and evidence of completion. If you need a documented baseline before changing production systems, start with an ITECS technology and security assessment.

Record the current baseline, accountable owner, source date, acceptance evidence, exceptions, and review trigger. Recheck assumptions before every consequential change, preserve rollback instructions, and close the work only when the intended result and unintended effects have been verified in the real environment. Keep the decision record with the system documentation so the next review starts from evidence rather than memory.

Sources and update trigger

• Microsoft Support — Windows 10 support ended
• Microsoft Learn — Extended Security Updates FAQ

Review trigger: Review monthly while Windows 10 remains and whenever Microsoft changes ESU or Windows 11 guidance.