Upgrading from Windows 11 Home to Pro takes under five minutes and does not delete a single file. This guide covers every method — Settings, Command Prompt and the generic key route — plus troubleshooting for the problems people most often hit along the way.
Everything you need to upgrade in under 5 minutes
- Go to Settings → System → Activation → Change product key and enter your Windows 11 Pro licence key
- Windows installs Pro components automatically — no reinstall, no file loss
- If Settings fails, the
changepk.execommand forces the edition switch - A genuine Windows 11 Pro retail licence key costs £38 from Software Supplies UK — instant delivery, lifetime warranty
What Changes When You Upgrade to Windows 11 Pro
Windows 11 Pro adds a set of features that Microsoft reserves for its professional tier. If you need any of the following, upgrading to Pro is the only route:
- BitLocker Drive Encryption — full control of drive encryption, including a startup PIN and encrypted USB drives
- Remote Desktop (host) — access your PC remotely from any device
- Group Policy Management — centralised control over users and settings
- Hyper-V Virtualisation — run virtual machines natively
- Windows Sandbox — test apps in an isolated environment
- Microsoft Entra ID & Domain Join — connect to business networks
- Maximum RAM: 2 TB (Home is capped at 128 GB)
A note on encryption: Windows 11 Home already has Device Encryption, which encrypts the drive automatically on supported PCs when you sign in with a Microsoft account. It stays on when you upgrade. What Pro adds is BitLocker’s controls — see our guide to setting up BitLocker on Windows 11 Pro.
The upgrade is an in-place edition change — Windows adds the Pro components on top of your existing installation. Your files, applications, browser settings, and user accounts are completely untouched.
Windows 11 Home vs Pro — full feature comparisonBefore You Start: What You Need
- A genuine Windows 11 Pro licence key (25-character retail key)
- An active internet connection for Microsoft’s activation servers
- Windows 11 Home installed on your PC
- Administrator access on the device
Method 1: Upgrade via Settings (Recommended)
This is the standard method and works in the vast majority of cases. It requires no command line access and takes under five minutes from start to finish.
-
1Open Settings
Press the Windows key, type “Settings”, and press Enter. -
2Navigate to System → Activation
In Settings, select System from the left panel, then Activation. -
3Click “Change product key”
Under the Activation section, select this option to open the key entry dialog. -
4Enter your Windows 11 Pro licence key
Type or paste your 25-character key carefully. Remove any extra spaces if pasting. -
5Click Next → Start
Windows downloads and installs the Pro components. This takes two to five minutes. -
6Restart when prompted
After restart, check Settings → System → Activation. It should show Windows 11 Pro — Activated.
- Edition: Windows 11 Pro
- Activation status: Windows is activated
Method 2: Upgrade via Command Prompt
If the Settings method fails — usually because Windows is in an unusual activation state — you can force the edition switch using Command Prompt as administrator.
-
1Open Command Prompt as Administrator
Press Windows key, type “cmd”, right-click Command Prompt, and select “Run as administrator”. -
2Run the upgrade command
Replace YOUR-WINDOWS-11-PRO-KEY with your actual Windows 11 Pro licence key:changepk.exe /ProductKey YOUR-WINDOWS-11-PRO-KEY click to copy -
3Restart when prompted
The system installs Pro components and restarts. After restart, verify in Settings → Activation.
Once the edition has switched to Pro, you can install and activate your key from Command Prompt (as administrator) with these two commands, one after the other. The first installs the key; the second asks Microsoft to activate it:
These commands do not change the edition. If Windows still says Home, use Method 3 first.
Method 3: Generic Key + Licence Key (Two-Step Upgrade)
A generic installation key for Windows 11 Pro switches the edition from Home to Pro without activating it. This is useful if you are getting “this edition cannot be activated with this key” errors — it forces the edition switch first, then you activate with your genuine key separately. Our guide to generic Windows 10 and 11 keys explains what these keys can and cannot do.
After using the generic key and restarting, Windows 11 Pro will be installed but unactivated. You must then enter your genuine Windows 11 Pro licence key to activate permanently.
Step 1 — Enter the generic Windows 11 Pro key (Settings → System → Activation → Change product key):
VK7JG-NPHTM-C97JM-9MPGT-3V66T
Click to copy
Step 2 — After restart, go to Settings → System → Activation → Change product key and enter your genuine Windows 11 Pro licence key to activate.
Will I Lose My Files or Apps?
No — this is an in-place edition upgrade, not a reinstall. All of the following are preserved exactly as they are:
- All personal files and folders
- All installed applications and settings
- Browser history, bookmarks, and saved passwords
- User accounts and preferences
- Network connections and saved Wi-Fi passwords
- Device Encryption, if it was already switched on
Retail Licence vs OEM — What Type Should You Buy?
Not all Windows 11 Pro keys work the same way. The type of licence determines whether you can transfer it to a new PC in the future.
Every Windows 11 Pro key sold by Software Supplies UK is a full retail licence. For a complete breakdown of licence types, see our complete guide to Windows licensing in 2026.
Troubleshooting: Windows 11 Home to Pro Upgrade Problems
In most cases the upgrade completes within a few minutes. If Windows does not switch editions or activation fails, the cause is usually an edition mismatch, an unusual activation state, a temporary Microsoft server issue, or a recent hardware change. Work through the relevant section below.
Activation errors often look like a problem with the key when they are not. If your key came from Software Supplies UK and anything below does not work straight away, contact our UK support team and we will work through it with you. For specific error codes, see our list of Windows 11 activation error codes.
The product key doesn’t work
Make sure the key matches the edition you are upgrading to. A Windows 11 Home key cannot activate Windows 11 Pro, and vice versa.
- Confirm you are upgrading Home → Pro
- Check the key was entered correctly — all 25 characters
- Remove any extra spaces if you pasted the key
- If the key came from Software Supplies UK and still fails, contact our support team before trying anything else
Error: “This edition cannot be activated with this key”
This error usually means Windows is still running the Home edition. The edition must switch to Pro before your genuine key can activate it. Use the generic key to force the edition switch first:
After restart, confirm the edition shows Windows 11 Pro, then enter your genuine licence key to activate.
Windows says Pro is installed but not yet activated
Microsoft’s activation servers occasionally take a few minutes to respond, and activation often completes on its own shortly after the upgrade.
- Restart your PC and check again
- Confirm you have an active internet connection
- Open Settings → System → Activation and select Troubleshoot
- If it has not activated after 30 minutes and your key came from us, get in touch
Upgrade stops or fails to complete
If the edition upgrade fails partway through, restart the device and try again from the beginning. If it fails a second time, use the two-step route instead: switch the edition with the generic key (Method 3), restart, then activate with your own key.
If Windows already shows Pro and only activation is outstanding, install and activate your key from an administrator Command Prompt:
Replace YOUR-WINDOWS-11-PRO-KEY with your actual licence key.
Windows still shows Home edition after restart
The edition switch occasionally does not complete on the first attempt, particularly on older hardware.
- Restart the PC a second time
- Run the generic upgrade command again
- Wait for the full restart to complete before checking the edition
- Confirm the system now reports Windows 11 Pro in Settings → System → About
- Then enter your genuine Pro licence key to activate
Activation error after hardware change
If you recently replaced your motherboard or made significant hardware changes, Windows may require reactivation. This is normal and does not mean your licence has expired.
- Open Settings → System → Activation
- Select Troubleshoot
- Choose I changed hardware on this device recently and sign in with the Microsoft account linked to your licence
- Select your device and tick This is the device I’m using right now
This route relies on the licence having been linked to your Microsoft account before the change. A retail licence from Software Supplies UK is transferable, so if the troubleshooter does not recognise it, contact us and we will help you reactivate. Our guide to transferring a Windows licence covers moving it to a different PC.
Still having activation problems after all steps above
If activation still fails after trying every step above, don’t assume the key is at fault. Many activation errors are caused by something harmless — a connection that dropped mid-activation, a key entered twice in quick succession, or a recent change to the PC.
- Wait 30 minutes and try again — server issues resolve quickly
- Restart the device and re-enter the key from scratch
- If you purchased your key from Software Supplies UK, contact our UK support team — we will work through it with you, and your key is covered by our lifetime warranty
Frequently Asked Questions
How long does the upgrade from Windows 11 Home to Pro take?
The upgrade typically takes two to five minutes from entering the key to completing the restart. On older or slower hardware it may take up to ten minutes. The process runs in the background and the device will prompt you to restart when it is ready.
Can I downgrade back to Windows 11 Home after upgrading?
There is no direct downgrade path within Windows 11. To return to Home you would need to perform a clean reinstall using a Windows 11 Home installation media, which would erase your files. For most users, staying on Pro is the better long-term decision.
Do I need to reinstall Windows to upgrade to Pro?
No. The upgrade from Home to Pro is an in-place edition change. Windows adds the Pro components to your existing installation without reinstalling the operating system. All files and applications are preserved.
Will upgrading to Pro turn on BitLocker?
Not by itself. If Device Encryption was already on under Home, it stays on after the upgrade. Pro then gives you BitLocker’s full controls — a startup PIN, encrypted USB drives and a choice of where the recovery key is kept — which you switch on from Manage BitLocker.
Can I use a Windows 11 Pro key I bought elsewhere?
Yes, as long as it is a genuine retail or OEM Windows 11 Pro key. The upgrade process is the same regardless of where you purchased the key. Volume licence and KMS keys are a different matter — they are meant for organisations with their own activation setup and are not a substitute for a retail key.
What is the cheapest legitimate way to upgrade to Windows 11 Pro in the UK?
A genuine retail Windows 11 Pro licence key from a UK reseller of surplus retail licences. Software Supplies UK supplies genuine retail keys at £38 with instant email delivery, lifetime activation, and a lifetime warranty. Microsoft’s own UK Store lists Windows 11 Pro at £219.99 (September 2026). Our guide to reselling Microsoft licence keys in the UK covers the legal background.
Ready to upgrade? Get your key in under a minute.
Genuine Windows 11 Pro retail licence key. £38. Instant email delivery. Lifetime warranty. UK support 7 days a week.
Gary Walsh is the Head of Tech Support at Software Supplies, with more than 20 years in the IT industry. Fully Microsoft-certified and experienced across the full business software stack — from Windows and Office to cloud infrastructure and device management — Gary delivers practical, no-nonsense advice that helps users and businesses get the most from their technology.
