If you’ve bought a used business-class PC (e.g., Dell Latitude, Lenovo ThinkCentre, HP ProDesk), it almost certainly came with Windows 10 Pro originally. Reinstalling Pro ensures you keep enterprise-grade features that Home lacks:
A: You can install it, but you cannot activate it legally without a valid license. Unactivated Windows runs with limited personalization and a watermark. windows 10 pro for refurbished pcs iso download