Trouble installing LL 6.6 on 64 bit laptop

[stevef]

OK, I guessing a bit here, but it seems the boot choices you are offered are aligned to the checked Boot options.
It is not clear which boot option equates to 'ubuntu' nor can I see a way to get the UEFI to 'remember' to boot ubuntu each time.

If I understand correctly, you currently have these checked Boot Options
1 USB device boot
2 mSATA Drive boot
3 HP Application

And get offered these choices to boot from
1 Notebook mSATA Drive (UEFI)
2 Boot from EFI file
3 ubuntu

I'm assuming there is no Live Media connected. 

In your situation, I'd be tempted to experiment a bit more.  Uncheck 'mSATA Drive boot' and 'HP Application' like you did with the Network and custom options. Leave USB device boot checked.  Save, reboot and see what happens. If the choices you are presented with change it may help narrow things down further.

If the system won't boot, go back to the options put a check mark against 'mSATA Drive boot' then save and retry.
If the system won't boot then, go back and remove the check from 'mSATA Drive boot' and put one against 'HP Application', then save and retry.

The aim being to remove options leaving only 'USB device' and the one that equates to 'ubuntu'