1. Problem

Windows 10 has reached the end of support on October 14, 2025. At this point technical assistance, feature updates and security updates is no longer provided [1]. If you have devices running Windows 10 it is not recommended to continue using it as is, because the lack of security updates will make your computer vulnerable to all sort of malware and cyberattacks [10].

2. Solutions

2.1 Win11-Compatible Device

If devices do meet the technical requirements to run on Windows 11,  Microsoft recommends upgrading them to Windows 11, which it advertises as a more modern, secure, and highly efficient computing experience.

Pros:

• Modern: most uptodate MS Windows version

Cons:

• Expensive: If hardware is not compatible (eg performance, security features (TPM2.0!!!), then one will have to replace the old incompatible device with a new compatible device.
• Ecological disaster: There is an estimated 400 million PCs, which function under Windows 10 but cannot be upgraded to Windows 11, which may have to go to waste [12] if not upgraded to an alternative operating system.
• More AI, Ads, Corporate Control: frequent updates of MS Windows may be required, which are transforming MS Windows further to an resource-intensive, AI-integrated, Ad-integrated subscription model. which may not be in the interest of most MS Windows users [add refs].

2.1 Non-Win11-Compatible Device

If devices do not meet the technical requirements to run on Windows 11, there are the following options.

2.1.1 Join Windows 10​​​​​​​ Consumer Extended Security Updates (ESU) program (until Oct 14, 2026)

Enroll in the Windows 10​​​​​​​ Consumer Extended Security Updates (ESU) program [2]. The consumer Extended Security Updates (ESU) program can protect your Windows 10 device up to a year after October 14, 2025. 

2.1.2 Windows 10 IoT Enterprise LTSC 2021  (until Jan 13, 2032)

2.1.2.1 microsoft.com

Windows 10 IoT Enterprise LTSC 2021 [3] is a specialized edition of the Windows 10 operating system designed for embedded devices and Internet of Things (IoT) applications, providing enterprise-grade management and security with a 10-year support lifecycle. It focuses on industrial and professional use cases such as kiosks, digital signage, factory automation, and smart manufacturing systems, where maximum stability and long-term support are required. [3] The installation files can be requested from Microsoft [11]. On this page, you can download a free 90-day evaluation ISO for Windows 10 Enterprise LTSC 2021, which also serves for IoT Enterprise LTSC installations. During installation or activation, a valid IoT Enterprise license key is required to convert it to a full licensed version.

To get a license code for Windows 10 IoT Enterprise LTSC 2021, you need to purchase an official product key from a certified reseller, distributor, or Microsoft Partner specializing in commercial and industrial software licensing. These licenses are available in several tiers to suit different device requirements and are typically intended for OEM, embedded, or professional use in businesses. [4, 5, 6]. 

2.1.2.2 massgrave.dev

It is also possible to install Windows 10 IoT Enterprise LTSC 2021 via massgrave.dev [7], as this platform provides official ISO files for various Windows editions, including Windows 10 IoT Enterprise LTSC 2021 [8].

The activation scripts and tools provided by massgrave.dev (often called MAS) are open-source and can be inspected for malicious code. Their popularity and open-source nature provide some level of transparency. Despite technical safety, it is important to note that using these tools is not legal, as they allow users to bypass Microsoft’s official licensing by the provided Microsoft Activation Scripts [9]. 

The address massgrave.dev seems to be play of words related to the provided Microsoft Activation Scripts (MAS). The website offers ISO images for a clean installation, and guides are available for installation and activation processes. However, it is important to ensure that the ISO files are genuine, as some sources may offer pirated copies, which can lead to activation and security issues.

The website massgrave.dev is widely discussed in online communities for providing Windows and Office downloads, as well as activation tools. While massgrave.dev is not recognized as an official Microsoft distributor, several users and tech forums report that the ISO download links often point directly to Microsoft servers or provide files whose checksums match official Microsoft releases. This suggests that the ISO files themselves, when verified against Microsoft’s hashes, are generally genuine and unaltered.​

References:

[¹] https://support.microsoft.com/en-gb/windows/windows-10-support-has-ended-on-october-14-2025-2ca8b313-1946-43d3-b55c-2b95b107f281

[2] https://www.microsoft.com/en-gb/windows/extended-security-updates?r=1

[3] https://learn.microsoft.com/en-us/lifecycle/products/windows-10-iot-enterprise-ltsc-2021

[4] https://radiant.in/microsoft-windows-10-iot-enterprise-ltsc-2021-license-cost-price-dealer-distributor-partner-in-india/

[5] https://www.buykeysoft.com/product/microsoft-windows-10-iot-enterprise-ltsc/

[6] https://www.whokeys.com/software/p202504011030576914.html

[7] https://massgrave.dev/windows_ltsc_links

[8] https://drive.massgrave.dev/en-us_windows_10_iot_enterprise_ltsc_2021_x64_dvd_257ad90f.iso

[9] https://massgrave.dev > Activate Windows / Office

[10] https://www.tomsguide.com/computing/windows-operating-systems/staying-on-windows-10-after-the-deadline-here-are-the-risks

[11] https://info.microsoft.com/ww-landing-windows-10-enterprise.html

[12] https://www.youtube.com/watch?v=_EMVaXsHe8o