
However, if the new build is meant to replace an old system, you may be able to transfer the Windows 10 product key to the new computer to save some money.

If you decide to get the parts and build the device yourself, you also need to provide a license of Windows 10, which could cost a few hundred dollars depending on the edition. Although when you get a new device, it usually comes with a copy of Windows 10 preloaded and activated, it's not the case when building a custom system.
