The ISO file is required when installing the OS not only on physical terminals but also on virtual terminal software such as VMware, Oracle VirtualBox, and Hyper-V. Evaluation Windows ISO files can be downloaded directly from the official Microsoft website for free.
In this article, the download source of the ISO file for each Windows client / Server, and the language used as a reference: the file size when the ISO file is downloaded in English (United States) are described.*The url of the download site is subject to change on a regular basis.
| Windows OS | Download site | File size | Remarks |
| Windows 10(Home&Education&Pro) | https://www.microsoft.com/en-us/software-download/windows10 | About 4.5 GB(Depending on the edition) | You need to run the Media Creation Tool to download the ISO file |
| Windows 10 Enterprise | https://www.microsoft.com/en-us/evalcenter/download-windows-10-enterprise | 32bit：About 3.6GB 64bit：About 5.0GB |
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| Windows 11(Home&Education&Pro) |
https://www.microsoft.com/en-us/software-download/windows11 | About 5.2 GB | |
| Windows 11 Enterprise | https://info.microsoft.com/ww-landing-windows-11-enterprise.html | About 4.7 GB | |
| Windows Server 2008 Standard （32Bit） | – | At the time of confirmation on 2021/06/28, the state of broken link | |
| Windows Server 2008 Standard （64Bit） | – | At the time of confirmation on 2021/06/28, the state of broken link | |
| Windows Server 2008 R2 | - | At the time of confirmation on 2021/06/28, the state of broken link | |
| Windows Server 2012 R2 | https://info.microsoft.com/ww-landing-windows-server-2012-R2.html | About 4.2GB | |
| Windows Server 2012 R2 Essentials | https://www.microsoft.com/en-us/evalcenter/download-windows-server-2012-r2-essentials | About 3.8GB | |
| Windows Server 2016 | https://www.microsoft.com/en-us/evalcenter/download-windows-server-2016 | About 6.5GB | |
| Windows Server 2016 Essentials | https://www.microsoft.com/en-us/evalcenter/download-windows-server-2016-essentials | About 4.5GB | |
| Windows Server 2019 | https://www.microsoft.com/en-us/evalcenter/download-windows-server-2019 | About 4.9GB | |
| Windows Server 2019 Essentials | https://info.microsoft.com/ww-landing-windows-server-2019-essentials.html | About 4.6GB | |
| Windows Server 2022 | https://info.microsoft.com/ww-landing-windows-server-2022.html | About 4.7GB |