[InMemoriam]

If this is stored on the hard drive, boot from a CD, and find it sitting unexecuted on the hard drive.

What do I win?

[beezdotcom]

If this is stored on the hard drive, boot from a CD, and find it sitting unexecuted on the hard drive.

A *really* good one should first try to write extra instructions to the firmware in your PC, to thwart this sort of detection later.