I downloaded 12.04 64bit, I checked with md5. Seems okay. made bootable usb with usb creater.
Now if try to boot up from live usb. I just get "boot error". Nothing else.
nothing else. googled around. nothing comes out.
UPDATE: some additional info.
- The usb manufacture is sony.
- it is fat32 partitioned.
- Most importantly I could install 12.04 on other systems by same usb.
- Yes, I definitely setup my Bios boot order to look for USB disk first.