Windows 10 Pro Phone Activation Key – 1 PC

A Windows 10 Pro phone activation key activates Windows 10 Professional through Microsoft's manual activation process instead of the automatic online check. You enter the key, Windows gives you an Installation ID, and Microsoft returns a Confirmation ID that permanently activates your PC. It is a low-cost way to unlock the full Pro edition on one computer.

What Is a Windows 10 Pro Phone Activation Key?

Most Windows keys activate automatically over the internet. A phone activation key uses the second official route: an ID exchange with Microsoft. The result is the same, a fully activated copy of Windows 10 Pro with every Pro feature and no watermark.

• Product: Microsoft Windows 10 Professional phone activation key
• Licence: one-time purchase for 1 PC, no subscription
• Activation method: Installation ID and Confirmation ID (manual activation)
• Delivery: digital key sent by email
• Architecture: 32-bit and 64-bit
• Language: multilingual

Important: phone activation is now done online

Microsoft retired its automated telephone activation line in December 2025. The same Installation ID and Confirmation ID exchange now takes place in Microsoft's online Product Activation Portal, which you open on any phone, tablet or computer. You will need a free Microsoft account to sign in. No phone call is required.

How to Activate Windows 10 Pro with a Phone Activation Key

1. Enter your key. Open Settings, then Update & Security, then Activation, select Change product key and type the 25-character key from your order email.
2. Open the activation wizard. Press Windows key + R, type slui 4 and press Enter. Choose your country or region.
3. Note your Installation ID. Windows shows a long number split into groups. Keep this window open.
4. Get your Confirmation ID. On your phone or another device, open Microsoft's Product Activation Portal, sign in with a Microsoft account, choose Windows and enter the Installation ID.
5. Finish activation. Type the Confirmation ID from the portal into the wizard on your PC and select Activate Windows.

The whole process takes about five to ten minutes. If you get stuck at any step, our support team will guide you through it.

Phone Activation Key vs Retail and OEM Keys

Want one-click online activation instead? See our Windows 10 Professional retail key or Windows 10 Professional OEM key.

Windows 10 Pro Features You Unlock

• BitLocker: encrypt your drives to protect data on lost or stolen devices.
• Remote Desktop: connect to your PC from another device.
• Hyper-V: create and run virtual machines.
• Group Policy and Domain Join: manage settings and connect to business networks.
• Windows Sandbox: run untrusted apps in an isolated environment.
• Microsoft Defender Antivirus and Windows Hello: built-in protection and fast, secure sign-in.

System Requirements

• Processor: 1 GHz or faster processor or System on a Chip (SoC)
• Memory: 1 GB RAM (32-bit) or 2 GB RAM (64-bit)
• Storage: 32 GB or larger hard drive or SSD
• Graphics: DirectX 9 or later with WDDM 1.0 driver
• Display: 800 x 600 resolution or higher
• For activation: a second device with internet access and a Microsoft account

Windows 10 Support Status

Microsoft ended standard support for Windows 10 on 14 October 2025. Windows 10 Pro continues to run once activated, and Microsoft offers a separate Extended Security Updates (ESU) programme for PCs that need security patches beyond that date.

Windows 10 Pro Phone Activation FAQ

Do I have to make a phone call?

No. Microsoft moved this process to its online Product Activation Portal in December 2025. You enter your Installation ID on the portal and receive the Confirmation ID on screen.

Will the key activate online automatically?

No. This key is intended for manual activation with an Installation ID and Confirmation ID. If you want automatic online activation, choose our retail or OEM key.

Is the activation permanent?

Yes. Once the Confirmation ID is accepted, Windows 10 Pro is activated on that PC with no expiry date.

What do I need to activate?

Your product key, the PC you are activating, a phone or other device with internet access, and a Microsoft account to sign in to the activation portal.

The command slui 4 does nothing. What should I do?

Make sure the product key has been entered first and that you are signed in as an administrator. If the wizard still does not open, contact our support team and we will help you complete activation another way.

Does it work for 32-bit and 64-bit?

Yes. The key activates either version of Windows 10 Pro.

How will I receive my key?

By email after payment is confirmed. Check your spam folder if it does not arrive, or contact support@mcdkeys.com with your order number.

What if activation fails?

Contact us by email or live chat with your order number and Installation ID. Our Refund Policy explains your options in full.

Compare Other Windows 10 Licences

• Windows 10 Pro 5 PC retail key: one key for up to five computers.
• Windows 10 Home to Pro upgrade: move an existing Home PC to Pro without reinstalling.
• Windows 10 Pro N key: Pro without the pre-installed media apps.
• Windows 10 Enterprise key: adds AppLocker, Credential Guard and DirectAccess.

Browse all Windows 10 product keys.