Hello, I have a Laptop with Windows 8 OEM and I want to perform a clean install of Windows 8.1. I pretty much know how to do it, but I have a question regarding the OEM and recovery partitions. If I fully format my HDD (including the OEM and recovery partitions), will I be able to access my UEFI BIOS settings? I currently access them through windows (Shift+Restart , Advanced mode -> UEFI Settings) OR by clicking a special button an my computer (while the computer is off). I ask this because I'm uncertain of the way the manufacturers put their custom BIOS into laptops. So If anyone has some experience with this, I would be grateful if You could share it with me (and others).