Once the download is finished, the ISO file itself won't install Windows—you need to "burn" it to a USB drive (at least 8GB).
Once you have your bootable USB drive:
💡 If you are building a gaming PC, the Windows 10 Home ISO is usually sufficient. Windows 10 Pro features like BitLocker and Remote Desktop are rarely needed for home users. If you'd like, I can help you: Walk through the BIOS/UEFI settings to boot from USB. Find the best tools to create a bootable drive on a Mac. Compare the differences between Home and Pro editions. windows 10 home download iso
Before you wipe your drive and install the ISO, make sure you've covered these bases: Once the download is finished, the ISO file