Windows Server 2025 Standard: Download, Install and Activation Guide

This guide is for Windows Server 2025 Standard. It covers a clean install on a physical server or virtual machine, converting an evaluation build to the full Standard edition, and activation.

Before you start

• Requirements: 1.4 GHz 64-bit processor, 512 MB RAM (2 GB with Desktop Experience), 32 GB storage, gigabit network adapter. UEFI with Secure Boot and TPM 2.0 are recommended.
• Have your 25-character Windows Server 2025 Standard key ready.
• Standard covers the host plus two Windows Server VMs on a fully licensed server. If you need more, see the Datacenter guide.

Step 1: Download the installation media

Use the download link in your delivery email. If it points to Microsoft's Evaluation Center, that is normal: the Server 2025 evaluation ISO is the same media, and Step 3 converts it to the full edition.

1. Download the Windows Server 2025 ISO.
2. For a physical server, write it to a USB drive with Rufus. For a VM, mount the ISO in your hypervisor.

Step 2: Install Windows Server 2025

1. Boot from the media and select Install Windows Server.
2. Choose your language and keyboard.
3. At the product key screen, enter your key if it is accepted, or choose I don't have a product key.
4. Select Windows Server 2025 Standard (Desktop Experience) for a graphical interface, or Windows Server 2025 Standard for Server Core. Do not choose Datacenter.
5. Accept the licence terms, choose Custom, select the drive and continue.
6. Set the Administrator password when prompted.

Step 3: Convert an evaluation install to full Standard

Skip this if the installer accepted your key in Step 2. Otherwise, do it before activating. This is the step people miss, and it is why a valid server key gets rejected.

1. Open PowerShell as Administrator.
2. Check the edition: DISM /Online /Get-CurrentEdition. An evaluation shows ServerStandardEval.
3. Run the conversion with your key:
   DISM /Online /Set-Edition:ServerStandard /ProductKey:XXXXX-XXXXX-XXXXX-XXXXX-XXXXX /AcceptEula
4. The server restarts, which can take several minutes.

Step 4: Activate

1. Open Settings > System > Activation. The DISM step often activates it directly.
2. If not, select Change product key, enter the key and select Activate.
3. Or from an elevated prompt: slmgr /ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX, then slmgr /ato. Confirm with slmgr /xpr, which should say permanently activated.

Windows Server 2025 Standard specific problems

Key rejected on an evaluation install

Go back to Step 3. Evaluation builds only accept a key through DISM /Set-Edition.

"The specified product key is invalid" after DISM

You installed Datacenter media or selected Datacenter in Step 2. Check with DISM /Online /Get-CurrentEdition. A Standard key cannot convert a Datacenter install; reinstall and choose Standard.

Error 0xC004F074, activation server unreachable

The server needs outbound HTTPS (port 443). Check firewall and proxy, or use phone activation from the Activation wizard if your delivery email says your key supports it.

Secure Boot or TPM warning during install

Server 2025 warns but does not block. Enable them in the firmware if available for best security.

Need help?

Do not keep retrying a rejected key. Screenshot the error and the output of DISM /Online /Get-CurrentEdition, then contact support with your order number. Server 2025 is in mainstream support until November 2029, and your purchase is covered by our 6-month licence warranty.