## [t3_qw1qrs](https://www.reddit.com/r/Windows10LTSC/comments/qw1qrs/ltsc_2021_vs_iot_ltsc_2021_tips_on_installations/)
In this post, "[Windows 10 Enterprise LTSC 2021](https://docs.microsoft.com/en-us/lifecycle/products/windows-10-enterprise-ltsc-2021)" will be referred to as "`non-IoT`", and "[Windows 10 IoT Enterprise LTSC 2021](https://docs.microsoft.com/en-us/lifecycle/products/windows-10-iot-enterprise-ltsc-2021)" will be referred to as "`IoT`".

Q: What's the difference between `non-IoT` and `IoT`?

A: They are essentially the same, except:

||`non-IoT`|`IoT`|
|:-|:-|:-|
|Lifecycle end date|Jan 12, 2027|Jan 13, 2032|
|Generic key type|KMS|RTM|
|[Generic key](https://docs.microsoft.com/en-us/windows-server/get-started/kms-client-activation-keys) embedded in the ISO file|`M7XTQ-FN8P6-TTKYV-9D4CC-J462D`|`QPM6N-7J2WJ-P88HH-P3YRH-YY74H`|
|Activation method|KMS|Digital License (HWID)|
|Languages available for ISO files|All native languages available, such like `en-gb`, `fr-fr`, `de-de`, etc.|Only `en-us` "English (United States)" is available.|

Q: If I want `IoT`, can I install with the ISO file of the `IoT` version, which is only available in `en-us`, then later on install language packs of my choice?

A: Yes. However, keep in mind that in some cases it will not be the same as installing from an ISO file in the native language. For exmaple, if you install with an `en-us` ISO, then install the `en-gb` language pack, then you could get the pesky "English (United States)" keyboard layout coming back again and again. It is recommended that you do a clean installation in the native language you want, e.g. install `en-gb` `non-IoT`, then switch to `IoT` (see below), so that you get `IoT` in native language "English (United Kingdom)".

Q: Can I switch between `non-IoT` and `IoT` after installation?

A: Yes. You can freely switch between these two at any time by changing the key (see generic keys in the table above). Right-click on Start menu, run "PowerShell (Admin)", type in the following command:

`slmgr /ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX`

Q: How can I activate?

A:

For genuine MSDN subscribers: you activate `non-IoT` with the KMS server of your institute, or activate `IoT` with the MAK key provided by your institute.

For home users: as per sub rules, no linking of pirated content, thus I will not provide any link here for activators. Just search for MAS.

================================================================================

Edit: MAS 1.5 may already support LTSC 2021. The section below were written for MAS 1.4 at the time of making this post and may be skipped:

MAS 1.4 will fail for `IoT` with the following error:

    ==== ERROR ====
    [Windows 10 IoT Enterprise LTSC 2021 | 19044 | SKU:191] HWID Activation is Not Supported.
    Press any key to exit...

However, simply modify the code for the SKU value in `HWID_Activation.cmd`:

Line 679:

    191-IoTEnterprise

and lines 761-763:

    :IoTEnterprise
    set "key=QPM6N-7J2WJ-P88HH-P3YRH-YY74H"
    exit /b

Then `IoT` activates permanently with HWID.

---

submitted to [r/Windows 10 LTSC](https://www.reddit.com/r/Windows 10 LTSC) by [u/etherealshatter](https://www.reddit.com/user/etherealshatter)