Help! I can't boot from a USB?

[MisterVortex]

When ever I try to boot from a USB, I get a windows error, it will always boot into my regular SSD. I tried changing the boot order, no luck there! I'm lost please help!
It's also not the USB, I tried it on 3 other computers and it worked fine...

 

[jemm]

You might want to have a look at http://windows.microsoft.com/en-US/windows7/Start-your-computer-from-a-Windows-7-installation-disc-or-USB-flash-drive

Or use the Bootrec.exe tool in the Windows Recovery http://support.microsoft.com/kb/927392