When buying a Windows license, you'll see two common types: OEM and Retail. They look the same and activate Windows identically, but there are important differences.
What Is an OEM License?
OEM (Original Equipment Manufacturer) licenses are designed for new PCs sold pre-installed with Windows. They're tied to the first PC they activate on. OEM keys are cheaper because they're sold without Microsoft's direct customer support.
What Is a Retail License?
Retail licenses are sold as boxed copies in stores or as digital downloads. They're meant for end users who buy Windows themselves. Key advantages: includes direct Microsoft support, can be transferred to a new PC, and includes both 32-bit and 64-bit installation media.
Side-by-Side Comparison
| Feature | OEM | Retail |
|---|---|---|
| Price | Lower (€15–€20) | Higher (€18–€60) |
| Transferable | No — bound to first PC | Yes — move anytime |
| Support | From PC maker / reseller | Direct from Microsoft |
| Features | Identical to Retail | Identical to OEM |
Which One Should You Buy?
Choose OEM if you're building a new PC and don't plan to upgrade soon. Choose Retail if you upgrade hardware often or want maximum flexibility.
Featured Options at MICROMANS
- Windows 11 Pro Retail — Retail, transferable.
- Windows 10 Pro Retail — Retail, great for Windows 10 users.
- For OEM keys, check the full Windows list.
Common Misconceptions
- "OEM keys are fake" — Wrong. Both are 100% genuine Microsoft licenses.
- "Retail keys give better performance" — Wrong. Both deliver identical Windows.
Conclusion
For most users a Retail license is the safer choice because it follows you when you upgrade. But if you're confident in your hardware and want to save money, OEM is a fantastic deal. Browse our full Windows catalog.