Symantec Endpoint Recovery Tool

Hello;

I currentley have the "SERT" running off a bootable USB stick. I have a requirement to have the USB boot off a standalone computer with no hard drives. It's sole purpose is to scan other USB sticks. I have no problem when a hard drive is connected but when I remove the hard drive the system will reboot as soon as you select "continue loading recovery tool" and chose a language. Has anyone ran into this problem or come up with a work around?

Thanks

Jeff