Why does My Passport Essential SE external USB HD freeze PC at boot?

Hello freind the reason the computer hangs during the boot is beacause of the VCD on the drive. Its no different from when you keep a cd rom in you cd drive the computer depending on your boot order will try to boot from it

The best option Is to disable the boot from USB in the bios here are the instructions

http://wdc.custhelp.com/app/answers/detail/a_id/1201/kw/boot/session/L3RpbWUvMTI5NzYzMjg0My9zaWQvMi1OamZ5bWs%3D