What is OEM software and why it costs less

A retail licence is the full-price consumer product. You buy it, it is tied to you rather than to a machine, and you may move it to a new computer when the old one dies or you upgrade.

It is the most expensive and the most flexible. If you replace hardware often, or you want the licence to outlive the machine, retail is the only type that reliably permits that.

OEM stands for Original Equipment Manufacturer. These licences were created for companies that build and sell computers — the copy of Windows already on a new laptop is an OEM licence.

The defining condition is that an OEM licence binds permanently to the first machine it activates on. When that motherboard fails, the licence is finished. There is no transfer. Vendors also expect the manufacturer, not the vendor, to handle support.

That is why it is cheaper, and the discount is real rather than a trick. You are buying a genuinely narrower right. For a desktop you will keep for five years, that may not matter at all. For a laptop you plan to replace next year, you are paying twice.

Volume licensing covers programmes sold to businesses, schools and public bodies deploying many seats at once, usually under a signed agreement with the vendor.

The important part for a private buyer: these licences are issued to a named organisation. They are not intended for resale to individuals, and a volume key sold to a member of the public is being sold outside the terms it was issued under. If a listing is dramatically below every other price, this is frequently why.

A key obtained that way can be deactivated later when the vendor audits the agreement it came from. The software was genuine; the right to give it to you was not.

Sellers are not always explicit. These questions usually settle it.

• Can I move this to another computer later? A clear no means OEM or something narrower.
• Is this issued to an organisation? If yes, it is volume, and you are not that organisation.
• What happens if it deactivates in six months? A seller who will not answer plainly has told you something.
• Is the price far below every other seller? Very large gaps are usually licence type, not a better deal.

To be plain about our own position: we are an independent reseller, not the vendor and not an authorised partner of any of these companies. We do not issue licences and we cannot restore one that a vendor deactivates. If lasting ownership matters more than price, buy retail from the vendor directly.