Any personal computer can boot from external devices other than the built-in hard drive.
With Active@ LiveCD you may start your PC from CD/DVD, USB Flash drive instead of a hard drive.
Note: Most of computer systems has a CD/DVD booting priority by default.
Starting from USB flash drive always requires changing boot priority sequence.
If Active@ LiveCD doesn't start, change the BIOS boot order so that CD or DVD or USB Flash drive is listed first.