That Desktop I Am Buying to Replace the Compaq for the Mill

It has a 256GB SSD with Windows 10.  They are installing the hard disk from the Compaq as the boot drive.  Once I am satisfied that this boots well and runs the mill, I will swap the drives, repartition the Windows drive to dual boot Windows 10/linux, copy all my development from the linux drive to the linux partition, and make that my boot drive.  I may never use Windows on that PC, but why throw away a perfectly good Windows license?  Linux booting from an SSD on a relatively new and fast PC should be a joy!