Buying guide
Retail, OEM or upgrade: choosing a Windows 11 licence
Understand the practical difference between a full Retail licence, a device-bound OEM licence and an edition upgrade before checkout.
Updated 2026-09-12 · 5 minute readThree Windows purchase labels often appear beside one another, but they solve different problems. Start by identifying whether the computer already has a qualifying Windows licence.
Retail: flexibility for one PC at a time
A full Retail licence is generally the most flexible option for a new or rebuilt computer. It licenses one eligible PC at a time and may allow transfer to another device after removal from the previous one, subject to Microsoft’s terms.
OEM: tied to the first computer
An OEM or System Builder licence is intended for the first computer on which it is installed and activated. It usually remains with that device, making it a better fit for a new build that will keep the same core hardware.
Upgrade: edition change, not a base licence
A Home-to-Pro upgrade adds Pro capabilities to an eligible, activated Home installation. It is not a substitute for a full licence on an unlicensed computer.
Decision checklist
- Does the PC already have activated Windows?
- Is the target edition Home or Pro?
- Do you expect to replace the computer?
- Does the hardware meet Windows 11 requirements?
- Do you need BitLocker or Remote Desktop host capabilities?
Use the source listing as the final check.
Product options and terms can change. Confirm the exact licence, platform, device count, live price, transaction currency, total and fulfilment information before checkout.
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