Hi ,there
No problem! Your HP EliteBook 830 G8 has the Windows key built into the BIOS, so you don’t need to enter anything.
Just download the Windows 11/10 ISO from Microsoft’s site, use the Media Creation Tool to make a bootable USB, and install it. When it asks for a product key, choose I don’t have one — Windows will auto-activate once it’s online.
You’ll see “Windows is activated with a digital license” under Settings > System > Activation.