How to Transfer Windows 11 Pro Retail Licence to a New PC

Moving your Windows 11 Pro retail licence to a new PC is completely allowed—retail keys are designed for portability as long as they’re activated on only one device at a time. If your old computer is no longer in use, transferring the licence is straightforward.

This guide walks you through the entire process, including how to uninstall the key on the old machine, activate Windows on the new system, and use troubleshooting tools if activation doesn’t go through on the first try.

What You Need Before You Start

Before you begin, make sure you have:

Your Windows 11 Pro retail product key
Access to the old PC (optional but helpful)
An active Microsoft account
Windows 11 installed on your new PC (or installation media ready)

Step 1: Verify That Your Windows Key Is a Retail Licence

A retail licence is transferable. OEM licences are locked to the motherboard and cannot move to another device.

To check your licence type:

Open Command Prompt (Administrator).
Type the following command: slmgr /dli
Look for the licence channel:
- Retail → transferable
- OEM → not transferable

If your key is retail, continue.

Step 2: Uninstall the Licence Key From the Old PC

If the old PC is no longer in use, this step ensures that Microsoft’s activation servers release the key so it can be assigned to the new device.

Open Command Prompt (Administrator) and run:

Uninstall the key

slmgr /upk

Clear the key from registry (recommended)

slmgr /cpky

This prevents Windows from reusing the key on the old machine.

Step 3: Install Windows 11 Pro on the New PC

If the new PC doesn’t have Windows installed yet, create bootable media using the official Media Creation Tool. During installation, either:

Enter your Windows 11 Pro key, or
Click I don’t have a product key (you’ll activate later)

Make sure you install Windows 11 Pro, not Home.

Step 4: Activate the Licence on the New PC

Once Windows 11 Pro is installed:

Open Settings
Go to System → Activation
Click Change product key
Enter your retail Windows 11 Pro key

If activation is successful, you’re done.

If not, continue to the next section.

Step 5: Fix Activation Issues Using the Activation Troubleshooter

Sometimes Microsoft flags the transfer as a hardware change. The built-in troubleshooter usually fixes this instantly.

Open Settings → System → Activation
Select Troubleshoot
Choose I changed hardware on this device recently
Sign in using the Microsoft account previously linked to your old PC
Select the old device from the list
Assign the licence to your new PC

Activation should complete within seconds.

Step 6: If It Still Doesn’t Activate, Use Phone Activation

For rare cases where the troubleshooter doesn’t work:

Press Windows + R
Type: slui 4
Choose your country
Call the toll-free automated system
Follow the onscreen steps to complete activation

This typically resolves difficult transfers.

What Happens to the Old PC After Transfer?

After the retail key has moved:

The old PC will show Windows is not activated
You can install a fresh copy or use another valid key
You cannot activate both PCs with the same retail key

Retail licences are sold directly to consumers and are designed for flexibility. You’re allowed to move the key as long as it remains active on only one device at a time. This is especially helpful when upgrading hardware, building a new system, or replacing a dead PC.

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