Installation guide
Microsoft Windows Server 2025 Datacenter — installation
Updated 2026-07-03
- First, purchase a genuine Windows Server 2025 Datacenter CD Key from our website.
- Immediately after your payment, you will be automatically sent a digital CD Key / Serial. You can view your unique Windows Server key on your order page.
- Download the Windows Server 2025 Datacenter evaluation installer from the official Microsoft website, here: https://info.microsoft.com/ww-landing-evaluate-windows-server-2025.html?lcid=en-us&culture=en-us&country=us2
Copy the required files to a DVD or an USB flash drive and perform the installation
If you installed the evaluation version instead of the retail version, you must first convert your installation to retail, by following these steps:
https://4sysops.com/archives/convert-windows-server-2019-evaluation-to-the-retail-edition/#upgrade-windows-server-2019-evaluation-to-full (instructions refer to 2019 but rest assured this works for all versions).
- Once you have installed the evaluation and converted it to Datacenter edition, enter the unique activation code that you purchased from us to activate.
To activate Windows Server, run the CMD as admin and perform the following command:
Dism /online /Set-Edition:ServerDatacenter /AcceptEula /ProductKey:XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
(Instead of the X, please enter the product key purchased)
- The CD Key will authenticate with Microsoft automatically, and the activation is complete! You now own a genuine copy of Windows Server 2025 Datacenter Edition.
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