I have gone into BIOS and set the USB as the boot drive with preference over the already installed Windows 8 drive but it just keeps booting into Windows 8.
I have changed the boot mode setting to "UEFI secure boot off".
The Windows 8 already installed on the laptop has some virus which means admin priveleges have been lost, thats why I want to install Windows 10 from scratch. If I try and install windows 10 as an upgrade whilst Windows 8 is already running then it says It is going to install Windows 10 home even though I have bought Windows 10 pro.
Thanks for any pointers.