Windows 8.1 Pro keys are activated by phone, using an Installation ID and a Confirmation ID. This guide walks you through the whole process step by step — it only takes a few minutes.
How to Activate Windows 8.1 Pro by Phone
- Select the Start button, type PC settings, and open it from the results.
- Select Activate Windows, then Contact customer support for help.
- If prompted, enter an admin password or confirm your choice.
- Select your location from the drop-down list and click Next.
- You’ll be shown a 63-digit Installation ID. Enter it in the tool below — along with your order number, order email and product type — to get your Confirmation ID:
Finishing Activation
Once the tool gives you your Confirmation ID, enter it back into the activation wizard and click Next — Windows 8.1 Pro will activate.
Trouble Activating?
If you run into any problem, open a support ticket and we’ll help during working hours. Every key includes a 7-day warranty, so reach out within the warranty period and we’ll send a fix or a new key.
Where to Buy a Genuine Windows 8.1 Pro Key
Need a key? You can buy a genuine Windows 8.1 Pro product key from our store at the best price — delivered instantly on your order confirmation page.
Download the Windows 8.1 ISO
To install or reinstall Windows 8.1, download the official ISO directly from Microsoft on the Windows 8.1 download page.
Frequently Asked Questions
Why does Windows 8.1 Pro activate by phone?
These keys use phone activation — you exchange a 63-digit Installation ID for a Confirmation ID (our tool does this for you), then enter it to finish activation.
Is this a genuine Microsoft key?
Yes — every key is genuine and activates directly with Microsoft.
Can I use one key on more than one PC?
Each key activates one PC. To cover more computers, you’ll need a key for each.
What if I get an activation error?
Open a support ticket within your 7-day warranty and we’ll send a replacement key or a fix.