A Microsoft product can be activated with a key (as long as it is not locked) over the phone. Errors in which: - can be activated by phone: 0xC004C020 - The activation server reported that the multiple activation key has exceeded the activation limit; 0xC004C008 - The activation server determined that the specified product key cannot be used. - in which activation is impossible, the key is blocked: 0xC004C017 - The activation server determined that the specified product key was blocked for this geographic region. 0xC004C003 - The activation server determined that the specified product key has been blocked. 0xC004C060 - The activation server determined that the specified product key is blocked.