Going from Windows 10 Home to Windows 10 Pro does not need a reinstall. It is an in-place edition change: you enter a Windows 10 Pro product key, Windows switches edition, and your files, programs and settings stay exactly where they are. The whole thing takes a few minutes and one restart.
This guide covers both ways to do it — from Settings and from the command line — how to confirm it worked, what to do when the key is refused, and whether Pro is actually worth it for what you do.
Two routes, and what each one costs
There are two ways to get from Home to Pro, and the difference is price rather than method:
- Microsoft’s Store route. Settings offers a “Go to the Store” button that sells you the upgrade at Microsoft’s full retail price.
- A product key. You enter a genuine Windows 10 Pro key instead. Windows performs the identical in-place upgrade — same result, considerably less money.
Either way the upgrade itself is the same operation. The rest of this guide assumes you are using a key.
Check which edition you have now
Worth thirty seconds before you start, because a Pro key will not apply to a machine that is already Pro, and the error you get is confusing.
Press Windows + R, type winver and press Enter. The second line names your edition. Or open Settings → System → About and read Edition.
If it already says Pro, you do not need this guide — you may just need to activate. See how to activate Windows 10 Pro.
What you need
- A genuine Windows 10 Pro product key. Ours arrive instantly on your order confirmation page, and you can fetch them again any time from Track Orders.
- An administrator account on the PC.
- An internet connection, so Windows can verify the key.
- Nothing else. No backup, no installation media, no reinstall. That is the point of an in-place upgrade.
Method 1: Upgrade from Settings
This is the route to try first. It works on almost every machine.
- Open Start → Settings → Update & Security → Activation.
- Click Change product key. If you only see “Go to the Store”, scroll — the Change product key link sits just below it.
- Type your 25-character Windows 10 Pro key and click Next.
- Windows checks the key, then offers to start the upgrade. Confirm it.
- The screen goes through a short “Upgrading Windows” stage and restarts once.
- After the restart you are on Windows 10 Pro, activated.
Type the key rather than pasting it if the box refuses to accept a paste — some builds strip the hyphens.
Method 2: Upgrade from Command Prompt
Use this when Settings accepts the key but the edition does not change, or when you are doing several machines and want it scripted. Open Command Prompt as administrator and run:
slmgr.vbs /ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXXReplace the X’s with your key. Windows confirms the key was installed, then restarts into Pro. Once you are back on the desktop, finish activation with:
slmgr.vbs /atoThere is a fuller walkthrough of this route in how to change your Windows 10 product key via CMD, and a reference for the other switches in our slmgr commands guide.
Confirm the upgrade worked
Run winver again — it should now read Windows 10 Pro. Then check activation status: Settings → Update & Security → Activation should say Windows is activated. Or from a command prompt:
slmgr.vbs /xprFull detail in how to check whether Windows is activated.
Will I lose my files?
No. An edition upgrade is not a reinstall. Your documents, photos, installed programs, browser profiles, drivers and settings all survive. You do not need to back up first, and you will not be asked for installation media.
The one exception is the non-core edition case covered below, where a clean install is the only route. If that turns out to apply to you, back up before you go any further — our clean install guide walks through three ways to do it.
What Pro adds over Home
Worth reading before you buy, because plenty of people upgrade for a feature they will never open.
- BitLocker — full-disk encryption. The single most common reason to upgrade, especially on a laptop that leaves the building.
- Remote Desktop host — connect to this PC from elsewhere. Home can only connect out, not accept connections.
- Hyper-V — run virtual machines natively.
- Group Policy and domain join — needed if the machine has to join a company network.
- More RAM — Home caps at 128 GB, Pro at 2 TB. Only matters on a workstation.
- Assigned access and deferred updates — useful for kiosks and managed fleets.
If none of those is why you are here, Home is genuinely fine and you can keep your money. Our Windows 10 Home vs Pro comparison goes through it feature by feature. And if the machine is a serious workstation — ReFS, more than four CPUs, persistent memory — the edition you actually want is Windows 10 Pro for Workstations.
One thing to weigh first: Windows 10 support has ended
Microsoft stopped issuing free security updates for Windows 10 on 14 October 2025. Upgrading Home to Pro does not change that — Pro reached end of support on the same date. You get the Pro features, not more updates.
That does not make the upgrade pointless. If you need BitLocker or Remote Desktop on a machine that is staying on Windows 10 — because of hardware, a specific program, or an offline role — it is still the cheapest way to get them.
But if the PC is your daily driver and online constantly, price the alternative before you commit: take two minutes to check whether your PC is compatible with Windows 11. If it qualifies, a Windows 11 Pro key gets you the same Pro features on a supported operating system. Our notes on what to do now that Windows 10 support has ended lay out the options, and upgrading to Windows 11 free or cheap covers the routes.
If the upgrade fails
The key is accepted but the edition never changes
Settings sometimes stores the key without triggering the edition swap. Run Method 2 above from an administrator prompt, then restart. That forces it.
0xC004F050
Usually harmless mid-upgrade: restart and Windows finishes switching to Pro, after which you activate. If it appears the moment you enter the key, the key and the edition do not match — confirm you have a Windows 10 Pro key and not a Windows 11 or Enterprise one.
0xC004F069 — “non-core edition”
If you see 0xC004F069 on a computer running Microsoft Windows non-core edition, you are on a Windows 10 Home variant that cannot switch edition in place — Single Language and some regional OEM builds behave this way. A clean install of Windows 10 Pro is the route. Back up first. If you would rather avoid the reinstall, open a ticket and we will look at alternatives with you.
“This key has already been used”
Each key activates one PC. If you have moved it from another machine, or it genuinely will not take, open a support ticket with your order number and the exact message. Every key we sell carries a 7-day activation warranty.
Any other error code
Look it up in our activation error code decoder — type the code and it tells you what it means and how to fix it.
Does the same method work on Windows 11?
Yes, with one change: on Windows 11 the Activation page lives under Settings → System → Activation rather than Update & Security. Everything else is identical. Step-by-step: how to upgrade Windows 11 Home to Pro.
Frequently Asked Questions
How long does the upgrade take?
A few minutes plus one restart. On an SSD it is usually under five minutes end to end.
Do I need to reinstall Windows?
No. Entering a Pro key upgrades the installation you already have. A reinstall is only needed in the rare non-core edition case above.
Is upgrading Home to Pro free?
No. It needs a Windows 10 Pro licence either way — Microsoft’s Store charges full retail, or you use a product key. There is no free route, and anything advertised as one is not a genuine licence.
Will my Home licence be wasted?
In practical terms yes — the machine moves to Pro and stays there. The Home licence is not transferable to another PC if it came preinstalled by the manufacturer.
Can I use one Pro key on two PCs?
No. Each key activates one machine.
Where do I find my current product key?
See how to find your Windows product key. You do not need the old Home key to upgrade, though.
Does the upgrade turn off BitLocker or reset anything?
No. Nothing is reset. BitLocker simply becomes available once you are on Pro — you switch it on yourself afterwards.
Can I go from Home straight to Enterprise?
Not with an ordinary in-place key swap in most cases. If that is what you actually need, ask us and we will tell you what is possible on your build. See also Windows 10 Enterprise.
Get your Windows 10 Pro key
A genuine Windows 10 Pro product key is a perpetual licence for one PC, delivered instantly on your order confirmation page — no waiting, and retrievable any time from Track Orders. Every key is backed by a 7-day activation warranty and free help getting it applied.