Can I transfer an OEM Windows license to a new computer?

Generally no. An OEM license is bound to the device it was installed on. Retail licenses are the transferable option.

OEM Activation 3.0 embeds the product key in the device firmware so Windows activates automatically from the key stored on the machine.

Is buying OEM keys in bulk legal for a business?

Yes, through the system builder or authorized reseller channel. Each key must be installed on a device you build or sell; reselling OEM keys as standalone retail licenses violates the program rules.

How do I prove my OEM licenses are compliant?

Keep the invoice, the order email, the device serial numbers, and the activation records together. That is the evidence auditors request.

2026 Windows OEM Licensing Explained: The Complete Guide