Windows 10 support ended in October 2025, and most people who are still on it are living on borrowed time through Microsoft’s Extended Security Updates program. One version of Windows 10 is different. Windows 10 IoT Enterprise LTSC 2021 keeps getting security updates until 13 January 2032, more than six years after everyone else was told to move on.
That fact explains a lot of the search traffic for “Windows 10 LTSC”. People with perfectly good PCs that fail the Windows 11 hardware check want a supported version of Windows that will run on them. LTSC can be that answer, but it comes with trade-offs you should understand before you buy a key.
What LTSC actually means
LTSC stands for Long-Term Servicing Channel. Normal Windows gets a feature update every year that changes the interface, adds apps and occasionally breaks something. LTSC doesn’t. Microsoft takes one release, freezes its feature set, and then ships only security and reliability fixes for the whole support period.
Windows 10 LTSC 2021 is frozen at the equivalent of Windows 10 version 21H2. What you install today is what you’ll have in 2031, plus patches.
LTSC also ships lean. Microsoft leaves out the apps that change all the time, so you won’t find the Microsoft Store or the bundle of consumer apps that come with Home and Pro. Microsoft Edge is included. Everything else you install yourself, the old-fashioned way.
Enterprise LTSC vs IoT Enterprise LTSC
There are two LTSC 2021 editions, and they look almost identical once installed. The big difference is how long they’re supported.
| Windows 10 Enterprise LTSC 2021 | Windows 10 IoT Enterprise LTSC 2021 | |
|---|---|---|
| Released | 16 Nov 2021 | 16 Nov 2021 |
| Security updates until | 12 Jan 2027 | 13 Jan 2032 |
| Based on | Windows 10 21H2 | Windows 10 21H2 |
| Microsoft Store | Not included | Not included |
| Intended for | Special-purpose PCs in organizations | Fixed-purpose devices: kiosks, POS, machines |
| Kymakers key | Install guide | Windows 10 IoT Enterprise LTSC 2021 key |
Microsoft cut the regular Enterprise LTSC lifecycle from ten years to five starting with the 2021 release, so Enterprise LTSC 2021 ends in January 2027, just over a year from now. The IoT edition kept the ten-year lifecycle. If you’re buying LTSC 2021 for the long support, the IoT edition is the one that delivers it.
Who LTSC is meant for, and who actually uses it
Microsoft is upfront that LTSC isn’t designed for every PC in an office. Its documentation describes it as a deployment option for special-purpose devices that do one important job and don’t need new features: think point-of-sale terminals, digital signage, medical equipment, factory controllers and lab machines. IoT Enterprise is licensed through device makers for exactly that kind of fixed-purpose hardware.
In the real world, plenty of people run it on ordinary desktops too, and it’s easy to see why:
- Older hardware. LTSC 2021 has normal Windows 10 hardware requirements. No TPM 2.0, no 8th-generation Intel cutoff. A 2015 office PC with an SSD runs it well.
- No surprises. No yearly feature update that moves settings around or reinstalls apps you removed.
- Less clutter. A clean install with very little preinstalled software, which also means fewer background processes.
The trade-offs nobody mentions in the forum threads
LTSC is great for the right machine and frustrating on the wrong one. Before you commit, check these:
- No Microsoft Store. Apps that only come from the Store, including the Xbox app and Game Pass, won’t install the normal way. If this is a gaming PC, LTSC is the wrong choice.
- Software support will thin out. Windows 10 21H2 will look old by 2030. Some vendors already ask for the latest Windows 11 release, and that list will grow. Browsers, Office and most business software still support Windows 10 today, but plan for that changing.
- New hardware may not have drivers. Very recent CPUs, Wi-Fi chips and graphics cards are tested on Windows 11. LTSC 2021 suits older or mid-life machines best.
- No new features. Ever. That’s the point, but it also means no Copilot, no new Snap layouts and none of what Microsoft adds to Windows 11 over the next few years.
Good fits and bad fits
| Good fit for LTSC 2021 | Better on Windows 11 Pro |
|---|---|
| A PC that fails the Windows 11 check but works fine | A PC that passes the Windows 11 check |
| Kiosk, POS, signage, CNC or lab machine | Gaming PC or anything that needs the Store |
| A workshop or reception PC that runs one app | A laptop that changes networks and software all the time |
| An offline or tightly controlled machine | A brand-new PC with the latest hardware |
Not sure which side your PC is on? Run our Windows 11 requirements check. If it passes, the free upgrade to Windows 11 or a Windows 11 Pro key is the simpler long-term choice.
How to install and activate LTSC 2021
LTSC isn’t offered through the normal Media Creation Tool. You download the ISO from Microsoft, put it on a USB stick with Rufus, and install with your key. The IoT and regular Enterprise LTSC editions are built from the same Windows image, so your product key decides which edition you end up with.
- Download the Windows 10 LTSC 2021 ISO from Microsoft (64-bit, your language).
- Write it to an 8 GB or larger USB stick with Rufus.
- Boot from the USB, choose Custom install, and pick I don’t have a product key when asked.
- After setup, open Settings > Update & Security > Activation > Change product key and enter your key.
Each step is laid out with screenshots in our Windows 10 IoT Enterprise LTSC 2021 install guide. If activation gives you any trouble, reply to your order email and support will help.
How LTSC compares with paying for Windows 10 ESU
If you’re on Windows 10 Home or Pro, Microsoft’s consumer ESU program now runs until 12 October 2027. It’s free if you turn on Windows Backup, or $30 for a year. That’s the easiest way to stay safe for another year without reinstalling anything. Our Windows 10 ESU guide explains how to enroll.
LTSC makes sense when you need longer than that. IoT Enterprise LTSC 2021 takes a machine to 2032 with one clean install and no annual renewals. For an older PC that does one job, that’s hard to beat.
And the Windows 11 version?
There’s a Windows 11 LTSC too, released in October 2024, and its IoT edition is supported until 2034. It also relaxes the Windows 11 hardware rules, so TPM 2.0 and Secure Boot become optional. If your hardware can handle it, that’s the better long-term bet. Read Windows 11 LTSC 2024 explained before choosing.
Windows 10 LTSC: FAQ
Is Windows 10 LTSC still supported in 2026?
Yes. Windows 10 Enterprise LTSC 2021 is supported until 12 January 2027, and Windows 10 IoT Enterprise LTSC 2021 until 13 January 2032.
Can I upgrade Windows 10 Home or Pro to LTSC without reinstalling?
Sometimes. Running setup.exe from the LTSC media inside Windows 10 can keep your files and apps when your current version and language line up, but setup doesn’t always offer that option. A clean install is the reliable route, so back up your files first either way.
Does LTSC 2021 need TPM 2.0?
No. It uses the regular Windows 10 hardware requirements, which is why it’s popular for older PCs.
Can I install the Microsoft Store on LTSC?
It isn’t included and Microsoft doesn’t support adding it. There are community workarounds, but if you need Store apps, choose Windows 11 Pro instead.
Will Office run on Windows 10 LTSC 2021?
Yes. Office 2024 Professional Plus and Office 2021 both install and activate normally on LTSC.
Is Windows 10 IoT Enterprise LTSC good for gaming?
It runs Steam and most PC games fine. Store and Xbox app games are the problem. If Game Pass matters to you, pick Windows 11.
