Yes, the free upgrade offer technically ended, but Microsoft still allows it with a valid 8.1 key using the Media Creation Tool.
Before diving into the download process, it is worth understanding why Windows 8.1 remains relevant. Released as a remedy to the polarizing Windows 8, Windows 8.1 Pro bridged the gap between the touch-centric "Metro" interface and the traditional desktop experience. Windows 8.1 Pro ISO Download 64 bit and 32 bit Updated
Without extended security updates (ESU), it is for internet-connected PCs. Use it offline or in a virtual machine only. Yes, the free upgrade offer technically ended, but
Before we dive into the download, let’s address the elephant in the room: Should you still use Windows 8.1? the free upgrade offer technically ended