We do a clean installation following the guide(s) on this website.
We choose either BIOS or UEFI to get started. If you are new to ArchLinux we recommend that you start reading from the very first article. We have laid out a learning path for you. Follow the numbering.
There are also articles available to set your bios so you can boot and install linux or make sure virtualbox works on your Windows 10.
Check out menu Phase 5 on this website to see all articles just about ArchLinux.