NiceHash OS does not require any special installation. After you have created a NiceHash OS bootable flash drive, you can just plug it into your mining rig.
Follow these steps:
1. Make sure your rig is turned off.
2. Plug your NiceHash OS bootable flash drive into any USB port.
3. Make sure your BIOS settings allow booting from flash drives.
4. Turn on the system. NHOS will automatically set everything up for you.
5. Log in to your NiceHash account, navigate to the Mining section and click Rig Manager. Here you should see your mining rig running NHOS.