I have installed Ubuntu 12.04 Desktop amd64 on my Lenovo ThinkPad E330. There were no problem during installation. Now I can boot to Ubuntu and use it.
BUT: now there is only one option in Boot Devices in my ThinkPad's BIOS:
I can boot ThinkPad to Ubuntu on HDD ONLY - no other options. I switched BIOS to "Legacy devices only" - this did not help :(
Could you, please, help me and explain how to boot my ThinkPad from USB drive? How can I switch back to Legacy devices and use MBR, not UEFI?