I currently have Debian 7.0 installed on my laptop (HP Pavilion dv9700). I would now like to install Arch instead. I wrote the Arch ISO to a USB drive, but when I start up my computer, it automatically loads to Debian.
I tried changing the boot order in the BIOS, but that didn't help, and there doesn't seem to be an option in the BIOS (PhoenixBIOS Setup Utility) to simply choose media to boot from. When setting USB Disk or USB diskette on key as the highest priority for booting, get the message "Remove disks or other media. Press any key to restart", which brings me to the GRUB loader when I remove the usb and press any key.
I found this which is for booting Xubuntu while having Ubuntu installed, but I don't know how I'd apply that to Arch and Debian. How would I go about booting from the USB?