I had a similar booting problem, when I installed from a usb drive to another usb drive. When the computer was booting up it would get stuck/freeze indefinetly whenever I hooked in the drive which it was installed to, even if I plugged in the drive while moving through the BIOS settings it would freeze my computer. However when I hooked the drive up directly with SATA it had no problem... I have a feeling the BIOS version I am on just shits itself with certain boot sectors...