Clarification: Lifetime Classic and Trial Mode

[Kirble]

I was going to say the mac address, but that can be spoofed easily. Also, about the IP changer and computer ID changer, google it, I'm sure you will find alot of various 1-click programs that automatically change it.

[Twinny]

PCID/MAC address is an easy spoof (though NAT cancels MAC address spoofing). IP addressing however is harder. You can use a proxy but most proxies arn't 'true' proxies. They handle some connections but not all. Kinda like how proxy browsers handle the http request but don't do the pictures.