: These are significantly cheaper than Retail versions, often priced between $10 and $30 on third-party sites, compared to $139+ for Retail. Where to Buy
: Marketplaces like VIP-SCDKey , Keysfan , or Kinguin sell digital OEM keys at deep discounts. These are often "grey market" keys—surplus licenses from other regions or high-volume buyers. While they usually work, there is a small risk of the key being deactivated later if Microsoft deems it a violation of terms. How to Use an OEM License
An OEM license is intended for system builders and manufacturers (like Dell, HP, or local PC shops). When you buy this license, you are technically acting as the "system builder."
: Microsoft does not provide direct technical support for OEM copies. As the "builder," you are responsible for your own troubleshooting.
: Enter the 25-character OEM key during the installation process or in Settings > System > Activation after Windows is installed.