Windows 10 LTSC End of Support: Dates for LTSB 2016, LTSC 2019 and LTSC 2021

Published: October 27, 2026 | Updated: October 27, 2026

Last reviewed: October 2026. Microsoft can change Extended Security Update terms and LTSC servicing guidance, so confirm current requirements before changing a production environment.

Windows 10 LTSC end of support is not one date, and it does not switch your devices off. Each long-term release has its own fixed lifecycle: Windows 10 Enterprise LTSB 2016 reached the end of support on October 13, 2026, Windows 10 Enterprise LTSC 2021 follows on January 12, 2027, and the older LTSC 2019 is supported until January 9, 2029.

That last point surprises many readers. Is the newest Windows 10 LTSC release really the first of the remaining two to lose support? Do you need Extended Security Updates? Should a kiosk, lab PC or machine controller move to Windows 11, or stay on a Windows 10 long-term build a little longer?

This guide explains the Windows 10 LTSC end of support dates for every release, what actually stops after each date, the paid ESU option and the practical upgrade paths for home labs, small businesses and IT teams.

Windows 10 LTSC End of Support: Quick Answer

Here is the current position as of October 2026:

• Windows 10 Enterprise LTSB 2016 (version 1607): support ended on October 13, 2026.
• Windows 10 Enterprise LTSC 2021 (version 21H2): support ends on January 12, 2027.
• Windows 10 Enterprise LTSC 2019 (version 1809): support continues until January 9, 2029.
• Windows 10 IoT Enterprise LTSC 2021: supported until January 13, 2032, but it is a separate edition licensed through device makers.
• Microsoft offers paid Extended Security Updates (ESU) for LTSB 2016 and LTSC 2021 for up to three years, through Volume Licensing and Cloud Solution Provider partners.
• Microsoft’s recommended destination is Windows 11 Enterprise LTSC 2024, supported until October 9, 2029.
• Devices keep running after the end date; they simply stop receiving free security updates.

In other words, the Windows 10 LTSC end of support timeline is staggered by release, and the right action depends on which release a device runs today.

What Is Windows 10 LTSC?

LTSC stands for Long-Term Servicing Channel, and older releases used the name LTSB, or Long-Term Servicing Branch. It is a version of Windows 10 Enterprise that receives monthly security and quality fixes but skips the regular feature updates that change the system every year.

Microsoft states that LTSC is designed for special-purpose devices that perform one important task, such as medical equipment, point-of-sale terminals, factory controllers and kiosks. It is not intended for most PCs in an organization, and it leaves out in-box apps that change often, including the Microsoft Store.

That stability is the whole point. A device certified on build 14393 or 17763 can stay on that build for years, which is ideal when a vendor will only support one exact configuration. It is also why the end of support date matters more than usual: there is no automatic feature update to carry the device forward.

For a closer look at the Store-free edition many readers choose today, see the Windows 10 Enterprise LTSC 2021 product page, which explains how it differs from Pro and standard Enterprise.

Is Windows 10 LTSC Still Supported?

Yes, partly. The Windows 10 LTSC end of support date has passed only for the oldest releases. LTSC 2019 and LTSC 2021 still receive monthly security updates, while LTSB 2016 no longer does unless the device is enrolled in Microsoft’s paid ESU program.

All LTSC releases follow Microsoft’s Fixed Lifecycle Policy, which publishes the support dates on the day a product is released. Here is the lifecycle for each Windows 10 long-term release:

Two definitions help when reading any Windows 10 LTSC end of support table:

• Mainstream support: security updates plus non-security fixes and design changes.
• Extended support: security updates only, with no new fixes or features.

Microsoft’s official Windows client supported versions page lists the current dates for every LTSC release and is the best place to confirm them before planning.

Windows 10 LTSC End of Support Dates by Version

The table below shows the Windows 10 LTSC end of support date for each release with its build number, newest first:

The short version: LTSB 2016 has already ended, LTSC 2021 ends in January 2027, and LTSC 2019 is the Windows 10 Enterprise long-term release with the most support time left.

What Happened to Windows 10 LTSB 2016 on October 13, 2026?

It received its final regular security update, making it the latest release to pass its Windows 10 LTSC end of support date. From that day, Microsoft no longer provides free security patches or technical support for Windows 10 Enterprise LTSB 2016, version 1607.

Microsoft’s official Windows 10 2016 LTSB lifecycle page confirms the October 2026 extended end date. Nothing in the operating system expires, so the device still boots, runs its applications and stays activated.

The risk builds gradually. Every new vulnerability found after October 2026 stays open on unenrolled devices, and software vendors tend to drop support for an unsupported build sooner or later. A ten-year-old build has had a good innings, but it now needs either ESU or a replacement plan.

When Does Windows 10 LTSC 2021 End of Support Happen?

On January 12, 2027. That is the next Windows 10 LTSC end of support milestone, and Windows 10 Enterprise LTSC 2021 has a five-year lifecycle with no extended phase, which is why it ends before LTSC 2019.

Microsoft shortened the LTSC lifecycle from ten years to five years with the 2021 release. The IoT Enterprise edition kept a ten-year lifecycle, which explains the very different 2032 date for Windows 10 IoT Enterprise LTSC 2021.

If you bought LTSC 2021 because it was the newest Windows 10 long-term release, that was a reasonable choice at the time. It simply means the planning window is now a matter of weeks rather than years, especially for devices that need vendor testing before any change.

Why Is Windows 10 LTSC 2019 Supported Longer Than LTSC 2021?

Because LTSC 2019 was released under the older ten-year rule, its Windows 10 LTSC end of support date comes last among the Enterprise releases. Its extended support runs until January 9, 2029, about two years after LTSC 2021 ends.

This makes the Windows 10 Enterprise LTSC 2019 license relevant for one specific group: people who must stay on Windows 10 for an application or certified device and want the longest remaining Windows 10 support. It activates Windows 10 Enterprise LTSC 2019 on one PC and is based on version 1809, build 17763.

The caveat is age. Build 17763 dates from 2018, so very new processors, chipsets and peripherals may lack drivers for it. Newer is not automatically better, but older is not automatically compatible either.

Does Windows 10 LTSC End of Support Mean Windows Will Stop Working?

Usually not. Your device keeps starting, running applications and opening files exactly as before.

What stops after the Windows 10 LTSC end of support date is Microsoft’s servicing commitment:

• Free monthly security updates
• Non-security bug fixes
• Microsoft technical support for that release
• Over time, support from third-party software and hardware vendors

Other components have their own lifecycles. Microsoft Edge, Microsoft Defender security intelligence updates, Microsoft 365 Apps and Office versions each follow separate schedules, so check them independently rather than assuming they end on the same day as Windows.

IMPORTANT: An unpatched LTSC device that is connected to the internet or a business network is the main risk. Isolate it, enroll it in ESU or replace the operating system rather than leaving it exposed.

Can You Get Extended Security Updates for Windows 10 LTSC?

Yes, for LTSB 2016 and LTSC 2021. ESU is Microsoft’s paid bridge past the Windows 10 LTSC end of support date. Microsoft offers paid ESU for up to three years after each release’s end date, and the program delivers security updates only, with no new features.

The ESU details that matter most when planning for Windows 10 LTSC end of support:

• Enterprise ESU licenses are sold through Microsoft Volume Licensing and Cloud Solution Provider partners.
• ESU for IoT Enterprise LTSB 2016 is offered through device manufacturers only.
• ESU years are cumulative, so joining in year two means paying for year one as well.
• Activation uses a separate ESU Multiple Activation Key (MAK) plus a year-specific activation ID.
• Devices need recent servicing stack and cumulative updates before the ESU key will activate.

Microsoft’s official guide to enabling Extended Security Updates for Windows 10 LTSB 2016 and LTSC 2021 lists the prerequisites and activation IDs. Once you have the ESU MAK, activation follows this pattern from an elevated Command Prompt:

slmgr.vbs /ipk <ESU MAK>
slmgr.vbs /ato <ESU Activation ID>
slmgr.vbs /dlv

Offline devices can use slmgr.vbs /dti <ESU Activation ID> to display an Installation ID, then complete activation with a Confirmation ID. If the idea of an Installation ID is new, Bcdkey’s guide to Confirmation ID and phone activation explains how the exchange works.

Keep in mind: ESU is a separate Microsoft program. A standard Windows 10 LTSC product key, including one from Bcdkey, activates the operating system but does not include ESU coverage.

How to Check Your Windows 10 LTSC Version

Before you work out which Windows 10 LTSC end of support date applies, check the build. Many organizations have a mix of LTSB and LTSC devices, so confirm the release on each machine before planning. Follow these steps:

1. Press Windows + R, type winver and press Enter.
2. Read the version and OS build line, for example Version 1607 (OS Build 14393.xxxx).
3. Open Settings → System → About and check the edition name under Windows specifications.
4. For a scripted check, open Command Prompt and run the command below.

reg query "HKLMSOFTWAREMicrosoftWindows NTCurrentVersion" /v EditionID
reg query "HKLMSOFTWAREMicrosoftWindows NTCurrentVersion" /v CurrentBuild

An EditionID of EnterpriseS indicates an Enterprise LTSB or LTSC edition. Match the build number to the table above: 14393 is LTSB 2016, 17763 is LTSC 2019 and 19044 is LTSC 2021.

How to Update or Move Off an Unsupported LTSC Release

Preparing for Windows 10 LTSC end of support is easier when you treat it as a small project rather than an evening task, because LTSC devices often run software that cannot tolerate surprises. A practical sequence looks like this:

1. Inventory every device, its LTSC build and the application it serves.
2. Ask the application or device vendor which Windows releases they support.
3. Back up the device, or capture a full disk image.
4. Decide on the path: ESU, an in-place upgrade to a newer LTSC release, or a clean install of Windows 11.
5. Test the chosen path on one spare device or a virtual machine.
6. Roll out to a small pilot group, then to the remaining devices.
7. Confirm activation and updates on each device afterward.

Microsoft states that you can perform an in-place upgrade from one LTSC release to a newer LTSC release and skip releases along the way. Moving from LTSC to a general edition such as Windows 11 Pro is a different job, and it usually means a clean install with applications reinstalled.

Test these components first, whichever Windows 10 LTSC end of support path you choose:

• The line-of-business or vendor application
• Device drivers, especially for scanners, printers and industrial hardware
• Kiosk or shell lockdown settings
• Security and endpoint management agents
• Licensing dongles and activation for third-party software

Ten minutes of checking a vendor’s support matrix can save a day of explaining why a production line stopped. For business-critical devices, involve an experienced administrator and keep the old image until the new build is validated.

Should You Stay on Windows 10 LTSC or Move to Windows 11?

It depends on what the device does, not only on the Windows 10 LTSC end of support calendar. A general office laptop and a hospital imaging workstation should not follow the same plan.

Stay with Windows 10 LTSC for now when:

• A vendor certifies only Windows 10 for its application or hardware
• The device does one fixed task and is isolated from the internet
• The hardware does not meet Windows 11 requirements such as TPM 2.0, a security chip that stores encryption keys
• You can move to LTSC 2019 or enroll in ESU to cover the gap
• Replacement equipment is already scheduled within the next few years

Consider Windows 11 when:

• The PC is used for everyday work, browsing and email
• The hardware meets Windows 11 requirements
• You want feature updates, the Microsoft Store and modern management
• You would rather avoid paying for ESU year after year
• The vendor already supports Windows 11 or Windows 11 Enterprise LTSC 2024

For general-purpose PCs, Windows 11 Pro is usually the simpler long-term choice. It activates one PC, includes BitLocker and Remote Desktop host support, and receives regular feature updates under Microsoft’s Modern Lifecycle Policy. If you are equipping several machines, Windows 11 Pro 5PC covers up to five computers.

Not sure whether Pro is necessary at all? Bcdkey’s Windows 11 Home vs Pro comparison covers which edition fits home users and small offices.

What About Windows 11 Enterprise LTSC 2024?

It is Microsoft’s recommended long-term successor for devices facing Windows 10 LTSC end of support. Windows 11 Enterprise LTSC 2024 is based on Windows 11 version 24H2 and is supported until October 9, 2029, while Windows 11 IoT Enterprise LTSC 2024 is supported until October 10, 2034.

It follows the same five-year rule as LTSC 2021 for the Enterprise edition, so it is not a ten-year escape hatch. It also needs hardware that meets Windows 11 requirements, which rules out many older kiosk and lab PCs.

Windows 11 LTSC is typically licensed through Microsoft Volume Licensing, so organizations with an agreement should check their entitlements before buying anything new. For a wider view of Windows 11 servicing dates, see our guide to Windows 11 24H2 end of support, since LTSC 2024 shares the 24H2 code base but follows a different lifecycle.

Is Windows 10 LTSC End of Support the Same as Windows 10 Home and Pro End of Support?

No. Windows 10 Home, Pro, Enterprise and Education on the general channel reached the end of support on October 14, 2025, and they have their own consumer and commercial ESU programs.

The LTSC releases have separate dates and a separate ESU program, which is why the two topics are easy to mix up. Is your PC running Windows 10 Home or Pro rather than LTSC? Use our separate guide to the Windows 10 ESU end date. That article covers consumer and commercial ESU for the general channel, while this guide focuses on the long-term servicing releases.

Recommended Action by Installed Version

Use this table as a starting point for each device approaching Windows 10 LTSC end of support:

Windows 10 LTSC End of Support Planning Checklist

Before the next Windows 10 LTSC end of support date arrives, confirm each item:

A spreadsheet with one row per device turns the project from a maze into a manageable checklist.

Licensing Notes for Windows 10 LTSC End of Support Planning

A few practical points prevent the most common surprises around Windows 10 LTSC end of support:

• The product key must match the edition: an LTSC 2019 key will not activate LTSC 2021, and vice versa.
• Monthly security updates within a release do not need a new key.
• An in-place upgrade to a newer LTSC release needs a key for that newer release.
• ESU coverage is purchased separately from Microsoft channels and activated with its own key.
• Each Bcdkey LTSC key covers one PC, so larger fleets need one license per device.

If an activation fails, the Bcdkey Get Confirmation ID tool helps with phone activation, and you can open a support ticket for help with a purchased key. Organizations buying for many devices can review the Bcdkey B2B wholesale program.

Final Thoughts

Windows 10 LTSC end of support is not really about one deadline. It is about matching each long-term device to the release, or the replacement, that keeps it secure for as long as it needs to run.

LTSB 2016 ended on October 13, 2026, LTSC 2021 ends on January 12, 2027, and LTSC 2019 remains supported until January 9, 2029. The simplest option for general-purpose PCs is Windows 11, while specialist devices can use ESU or a vendor-approved LTSC release to buy planning time.

Windows 10 LTSC end of support is also a good moment to review hardware. Organizations with bigger plans should look at Windows 11 Enterprise LTSC 2024 through their volume agreement and schedule hardware refreshes around it.

Start by running winver on every LTSC device this week and writing down the build number. When you are ready to choose an edition, compare the Windows 11 range and Windows 10 LTSC releases on Bcdkey.

FAQ About Windows 10 LTSC End of Support: Dates for LTSB 2016, LTSC 2019 and LTSC 2021

When is Windows 10 LTSC end of support?

It depends on the release. Windows 10 Enterprise LTSB 2016 ended on October 13, 2026, LTSC 2021 ends on January 12, 2027, and LTSC 2019 ends on January 9, 2029.

Is Windows 10 LTSC 2021 supported until 2032?

No. Only Windows 10 IoT Enterprise LTSC 2021 is supported until January 13, 2032; the standard Enterprise LTSC 2021 edition ends on January 12, 2027.

Will Windows 10 LTSB 2016 stop working after October 13, 2026?

No. The device keeps running and stays activated, but it no longer receives free security updates unless it is enrolled in Microsoft’s paid ESU program.

Can I buy ESU for Windows 10 LTSC from a retailer?

No. Microsoft sells Enterprise LTSC ESU through Volume Licensing and Cloud Solution Provider partners, and IoT ESU through device manufacturers; a regular LTSC product key does not include ESU.

Can I upgrade Windows 10 LTSB 2016 to LTSC 2019 without reinstalling?

Yes. Microsoft supports in-place upgrades from one LTSC release to a newer one, but you need a valid key for the newer release and should test your applications first.

Can I upgrade Windows 10 LTSC directly to Windows 11 Pro?

Normally, no. Moving from an LTSC edition to Windows 11 Pro usually requires a clean install, so back up data and plan to reinstall applications.

Does Windows 10 LTSC end of support affect Office?

No. Office and Microsoft 365 Apps follow their own lifecycles, so check the Office version separately even though it runs on the same PC.

Is Windows 10 LTSC 2019 still a sensible choice in 2026?

Yes, for specialist devices that must stay on Windows 10. It is supported until January 9, 2029, but very new hardware may lack drivers for its 2018 build.

What happens to my files after Windows 10 LTSC end of support?

Nothing. Your files, applications and settings stay exactly where they are; only Microsoft’s free security updates stop.

Do I need a new product key for monthly LTSC updates?

No. Monthly security and quality updates within the same LTSC release install without a new key; only an upgrade to a different release or edition needs one.