When you buy Windows, you're not just buying the operating system. You're buying a license that defines how you can use it, where you can install it, and what happens if you replace your computer. The type of license you get determines all of this.
There are three main Windows license types: OEM, Retail, and Volume. Each one works differently, costs differently, and comes with different rules. This guide explains what each license means and which one fits your needs.
Quick answer: Which license should you get?
For most people, a Retail license is the best choice. It's yours forever, you can transfer it to a new computer, and it comes with full Microsoft support. OEM licenses are cheaper but tied to one computer forever. Volume licenses are for businesses with multiple computers. If you're buying Windows for personal use, get Retail.
OEM license (Original Equipment Manufacturer)
An OEM license is the type that comes pre-installed on most new computers. When you buy a laptop or desktop from Dell, HP, Lenovo, or any major manufacturer, the Windows license is OEM. Microsoft sells these licenses to computer manufacturers at a lower price, and the manufacturer includes them with the hardware.
The key thing about OEM licenses: they're tied to the computer they came with. Permanently. If your computer dies, the license dies with it. You can't move it to a new machine. Microsoft's official policy is that an OEM license is tied to the original hardware and cannot be transferred.
What you get with an OEM license
- Full version of Windows with all features
- Lifetime license for the original computer
- All Windows Updates and security patches
- No Microsoft support (support comes from the computer manufacturer)
- Cannot be transferred to another computer
- Can only be installed once on the original hardware
OEM license pros
OEM licenses are the cheapest option. They cost significantly less than retail licenses. If you're building a budget PC and don't plan to move Windows to another computer later, an OEM key saves money.
OEM license cons
The biggest drawback is that you can't transfer the license. If your motherboard fails or you build a new computer, you need to buy a new Windows license. OEM keys also can't be used to upgrade from one Windows edition to another in some cases.
Microsoft support is also limited. If you have activation issues or need help with Windows, you contact the computer manufacturer, not Microsoft. Some manufacturers are helpful. Others are not.
Who should buy an OEM license?
OEM licenses make sense if you're building a computer you plan to keep for years, you don't mind losing the license when the hardware dies, and you want to save money upfront. They're also fine for secondary computers or test machines where the stakes are low.
Retail license (Full Packaged Product)
A retail license is the standard license you buy directly from Microsoft or an authorized retailer. It comes in a box (or as a digital download) and includes full Microsoft support. This is the most flexible Windows license available.
The main advantage: you can transfer a retail license to a new computer. If your current PC dies, you deactivate Windows on the old machine and activate it on the new one. You can do this as many times as you want, though only on one computer at a time.
What you get with a retail license
- Full version of Windows with all features
- Lifetime license that can be transferred to new computers
- All Windows Updates and security patches
- Full Microsoft support for activation and installation issues
- Can be moved to a different computer (one at a time)
- Can upgrade from Home to Pro with a Pro key
Retail license pros
Flexibility is the biggest benefit. You own the license, not the computer. Build a new PC? Transfer Windows. Motherboard fails? Reactivate on a replacement. You're not stuck. You also get direct Microsoft support, which can be helpful during installation or activation problems.
Retail license cons
Retail licenses cost more than OEM licenses. You're paying for the transferability and support. For some people, that premium is worth it. For others, it's an unnecessary expense.
Who should buy a retail license?
Anyone who wants peace of mind. If you plan to upgrade your computer in the next few years, a retail license lets you take Windows with you. If you want Microsoft support, you need retail. If you're building a primary computer that you rely on daily, the extra cost of retail is insurance against hardware failure.
Volume license (Business and Education)
Volume licenses are designed for organizations that need to install Windows on many computers. Businesses, schools, government agencies, and nonprofits use volume licensing to manage multiple Windows installations under a single agreement.
Volume licenses come in several forms. The most common are Key Management Service (KMS) and Multiple Activation Key (MAK). Both work differently from retail and OEM licenses.
KMS (Key Management Service)
KMS licenses activate against a local server inside your organization, not against Microsoft's servers. The computers check in with the KMS server every 180 days to stay activated. If they can't reach the server within that window, Windows deactivates.
KMS is meant for computers that are regularly connected to the company network. It doesn't work well for remote workers who rarely come into the office, unless they connect through a VPN.
MAK (Multiple Activation Key)
MAK licenses activate directly with Microsoft's servers, similar to retail keys. Each key has a set number of allowed activations. Once you reach the limit, you need to request more activations from Microsoft.
MAK is better for computers that don't regularly connect to the corporate network, like laptops used by remote employees.
What you get with a volume license
- Lower per-device cost when buying in bulk
- Centralized management through KMS or MAK
- All Windows features included
- Windows Update and security patches
- Not transferable to personal use
- Requires organizational agreement with Microsoft
Volume license pros
The per-device cost drops significantly when you're buying for 20, 50, or 100 computers. IT administrators can manage activation centrally, deploy updates consistently, and track license usage across the organization.
Volume license cons
You can't buy a volume license as an individual. You need a business, school, or organization with a Microsoft Volume Licensing agreement. KMS licenses require a server on your network. MAK licenses have activation limits. Neither is designed for personal use.
Who should use a volume license?
Businesses, schools, and organizations with multiple computers. If you're an individual buyer, this doesn't apply to you. Volume licensing is negotiated through Microsoft's business programs, not purchased at retail.
Digital license (how modern activation works)
A digital license isn't a separate license type. It's how Microsoft tracks your activation. When you enter a product key for the first time, Microsoft creates a digital license on their servers that's tied to your hardware. After that, Windows activates automatically when you reinstall, as long as it's the same computer.
This is why you can reinstall Windows without entering a key again. Microsoft recognizes your hardware and activates automatically. It's also why changing your motherboard can cause activation issues, because Microsoft sees it as a different computer.
Both OEM and Retail licenses create digital licenses. The difference is that Retail digital licenses can be moved to new hardware, while OEM ones cannot.
OEM vs Retail vs Volume: Side-by-side comparison
Here's how the three license types compare on the things that matter: price, transferability, support, and intended use.
OEM: Lowest price. Tied to one computer forever. No Microsoft support. For system builders and pre-installed PCs. Retail: Higher price. Transferable to new computers. Full Microsoft support. For individuals who want flexibility. Volume: Lowest per-device cost at scale. Managed centrally. For businesses and organizations with many computers.
What about the Microsoft Store?
When you buy Windows from the Microsoft Store, you get a retail license. It's digital, delivered to your email, and tied to your Microsoft account. The license is transferable and comes with full support. It's the same as buying a retail box, just without the box.
Third-party sellers may offer OEM keys at lower prices. These are legitimate keys, but they come with OEM restrictions. Make sure you understand what you're buying before you check out.
Can you upgrade between license types?
You can upgrade from Windows Home to Windows Pro with a Pro key, regardless of whether the original license was OEM or Retail. The upgrade process adds Pro features to your existing installation.
You can't upgrade from an OEM license to a Retail license. They're fundamentally different agreements. If you want a Retail license, you buy a new one and enter it in Settings > Activation > Change product key.
Current Windows license pricing
Here's what you can expect to pay for Windows licenses today:
Windows 10 Home (1 PC): around $57. Windows 10 Pro (1 PC): around $78. Windows 11 Home (1 PC): around $55. Windows 11 Pro (1 PC): around $50. Windows 11 Pro (5 PCs): around $130.
All keys are lifetime licenses delivered digitally within 24 hours. You get a download link and a product key. Multi-PC packs bring the per-device cost down significantly.
Frequently asked questions
What's the difference between OEM and Retail Windows?
The main difference is transferability. A Retail license can be moved to a new computer. An OEM license is permanently tied to the original hardware. Retail also includes Microsoft support; OEM support comes from the computer manufacturer.
Can I buy an OEM license for my own computer?
Yes. OEM licenses are sold separately and can be purchased by anyone. They're commonly sold by system builders and online retailers. Just remember that once you activate an OEM key, it's locked to that motherboard.
Is it legal to buy cheap Windows keys online?
It depends on the source. Legitimate retailers sell OEM and retail keys at various prices. If the key is genuine and was obtained legally, it's fine to use. If it's a stolen key, a volume key being sold illegally, or a key from an unauthorized region, Microsoft may block it.
What happens to my Windows license if I replace my motherboard?
If you have a Retail license, you can reactivate Windows on the new hardware. You may need to use the phone activation method and explain that you replaced the motherboard. If you have an OEM license, the license is lost. You'll need to buy a new one.
Can I use a volume license at home?
No. Volume licenses are tied to an organization. If you leave the organization, you lose the license. Microsoft's licensing agreement prohibits using volume licenses for personal use. If you're buying Windows for home, get a Retail or OEM license.
Which Windows license type is the best value?
For personal use, Retail is the best value because you can transfer it to new computers over the years. One Retail license can follow you through multiple PC builds. OEM is cheaper upfront but becomes a sunk cost when your computer dies. For businesses, Volume licensing offers the lowest per-device cost.
Do all Windows license types get the same updates?
Yes. OEM, Retail, and Volume licenses all receive the same Windows Updates and security patches. Microsoft doesn't differentiate between license types when pushing updates. The features and security are identical across all license types.
