I have a Dell XPS 8500 win 8.1. I recently installed Linux Mint 17 on an external HD which booted from GRUB. I now removed Mint 17 ok but I'm left with a reference to 'UBUNTU' in my bootloader. I'm unable to remove this reference. this reference to UBUNTU prevents me from booting from a LINUX USB. I think I need to repair the bootloader but can't and I have tried all sorts of.....FIXBOOT, FIXMBR. etc. Any help with be apprciated
Keith