Trying to run live session

[DougieFresh4U]

Ok, so I am so frustrated with this Windows 8.1 machine!!
Eventually it will dual boot as I have always done
I have a USB stick with UBUNTU on it and I want to see about running a live session.
I have already screwed up machine trying a DVD and had to do 'recovery' of my Win 8.1.
I have disabled 'secure boot'
I get to boot order screen and it has the following entry:
Windows Boot Manager
then something about:
UIEFI...IVPT 4
UIEFI...IVPT 6
and then :
Legacy Sources
Ok, those are not the exact words in each line but hope someone
gets what I mean, lol
This is an HP AMD A4-5000 APU
1TB hard drive
6GB RAM
Please, any help I would really like
Thanks

EDIT: if more info is needed, please ask

[C.S.Cameron]

Is your Ubuntu 32 bit or 64 bit?

[grahammechanical]

Have you read this?

https://help.ubuntu.com/community/UEFI

You may also have difficulty in getting a successful install of Ubuntu because some manufacturers are modifying the UEFI to only boot Windows. There is a work around. It all depends upon whether HP is one of those manufacturers that are doing this. You most probably will also need Boot Repair.

https://help.ubuntu.com/community/Boot-Repair

That machine has built in graphics (I think). Does it also have another graphic adapter so that you have hybrid graphics? It is all additional complications.

Regards.

[DougieFresh4U]

Is your Ubuntu 32 bit or 64 bit?
64 bit
Yes I did read that grahammechanical, thanks

I finally got a pic of my boot screen which I don't understand.
At this point I would be happy to be able to just run a live session!!
I knew I should have just built a new machine as I did 8 years ago (it died)
Any ideas on how to get it to boot from USB?