Have a laptop with x64 amd, 3 gig ram, win 7. Downloaded the desktop iso file 12.10 x64 from ubuntu website. Also universal usb installer and unetbootin win. When I finished the first step => load the iso file in universal usb installer to my usb stick and then restart with usb stick in the usbport, bios not find the usb media. I have changed the usb to boot as nr 1, harddrive as nr 2 in bios. Also tried with the 32 bit ubuntu verson and unetbootin but dosen´t work? Press F#9 when boot and bootmenu comes up and only harddrive with win 7 is available to choose, usbstick dosent shows up. Whats wrong?
If USB doesn't show in boot menu, probably there's something wrong with it. Perhaps you should format it and see if it shows in the boot menu without anything else in it. You should proceed with creating Ubuntu live USB only after you can see the reformatted empty USB. If it doesn't show up perhaps you should try another one.