We buy computers from Dell. Each computer comes with a license from Microsoft. (Sticker with license key) We then buy an Enterprise license to install Windows (any version) on that computer. Dell sells computers without Windows. We can buy our computers without Microsoft licenses, and then install our Enterprise software. (Volume Licensing)
We never use the preinstalled version, and we never use the license key we pay for that comes with the computer. Currently, Microsoft gets payment for two copies of Windows for every computer we purchase.
We can save millions across the government.