check out lojack for laptops, if you want something with a guarantee. since it embeds itself in the BIOS it will survive hdd replacements and os wipes, too. I

check out lojack for laptops, if you want something with a guarantee. since it embeds itself in the BIOS it will survive hdd replacements and os wipes, too. I have it on my thinkpad, and it's survived numerous hdd replacements and os wipes. the only downside i can think of is that it doesn't support linux.