Can't boot from USB

[Craigus]

I am trying to install Ubuntu from a USB stick on a spare HD that I have installed on my computer.

I am following all the guidelines from the Ubuntu website, creating an ISO on the USB using the 'Universal USB Installer' but when I go into the boot menu by pressing F12 on the splash screen, I get a list of drives, but when I select the USB it just goes back and boots me into windows from the C:\ drive.

I have tried this on 2 different USB sticks now, I'm slightly perplexed. Any Ideas? Motherboard info is in my sig.

Thanks

 

[Craigus]

None of these work, they all seem to fail and throw me back to default which is W7.

 

[Craigus]

All installed now. I ended up disconnecting my C:\ drive and it wouldn't detect any boot media, so I had to make a trip to buy some DVD's and that ended up working fine.

Bit of a pain though.