'boot error' when trying to use Live USB with my Mum's Dell desktop!

[peGGi]

Hi,

I made a live USB of Zorin OS 64bit with persistent storage for my Mum, so she can do internet banking and other sensitive stuff online a little more safely. I used UUI to create it.

When I try and boot into this live USB, I get a 'boot error' message, immediately after the first 'Dell' splashscreen and nothing else.

Her PC is a Dell Inspiron 545 desktop with Intel Core2 Quad CPU 2.5Ghz and 3Gb RAM. It usually runs Windows 7 64-bit.

It works perfectly from my own system (Lenovo Z570 laptop with Core-i5 second gen).

I also tried a live USB I had already created with Fedora 17 (with persistent storage also) and the exact same thing happened. It too works fine on my machine.

I checked the boot settings and other BIOS settings on her machine and can't see anything obvious that would cause this.

So clearly the USB keys are fine and the creation of the live usbs worked fine. Would there be a particular reason why this wouldn't work with her machine? I know that its CPU is quite unusual; don't know if that would have anything to do with it.

All suggestions appreciated!

[MikeTbob]

Does the machine have UEFI or "Secure boot" in the BIOS? Is it a new machine?