Effective March 31, 2024, Microsoft will no longer offer Windows 10 Pro as a downgrade choice in operating systems on devices delivered from the factory, making it the last date on which our Surface partners may sell PCs with Windows 10 Pro preinstalled with a Windows 11 Pro license. PCs with Windows 10 Pro preinstalled may continue to be sold, but the last date new orders were accepted by Microsoft was March 8, 2024. Any existing Windows 10 DC inventory can be ordered until supplies run out. After March 31, 2024, customers will need to manage the Windows 10 Pro installation process themselves when utilizing the Windows 11 Pro downgrade rights allowed by the OEM EULA or exercise Software Assurance rights with volume license agreements to run the old version on new hardware.