A: You can install without a key (click "I don't have a product key"). You'll have a 30-day trial. Enter a valid Windows 10 Pro key later to activate.
A: Yes. Run the setup from within Windows and choose "Keep personal files and apps." It will upgrade to Pro if you have a Pro key. Windows 10 Pro Iso Download LINK 64-bit Direct Link
If you need to perform a clean installation of Windows 10 Pro, run it in a virtual machine, or create a bootable USB drive, getting a legitimate, untouched ISO file is critical. You do not need third-party tools or shady torrents. A: You can install without a key (click