Hi. I've changed my hard drive on my Dell All In One so need to install Win10. Neither my DVD or USB devices are recognized and I have the OS on both media options that I downloaded from Dells website. I've gone in to Bios and was able to set the USB as #1 boot and it looked like it was trying to boot from it (USB was showing a steady light like it was being read). Shortly afterward the screen came up with the message No bootable devices. So they are clearly not enabled somehow yet show up in test and tested out fine. This machine is 2 yrs old and the hard drive it came with died requiring this change out. Any suggestions?