I am from Asia ,
For me , i will definitely chose Trend Micro .
Not just because had more function , but also more suitable for Asia area .
Trend Micro basically is a cloud defenses software ,
had almost 70% detect ability need the internet stay in connection status ,
Trend Micro had more than ten million user in Asia , so the respond is fast .
Also their product start from 2017 version , strengthen the defense against for Ransomware ,
they did pretty good at this part .
BullGuard i only try for few days on my VM machine ,
i remember that BullGuard are using Bitdefender's datebase ,
also quite good , not a bad chose .
However , Bitdefender do not have any branch in China or Chinese area ,
BD usually detect the threats from Asia little slow than other ,
so that is why if you ask me between those two product , i will chose Trend Micro .
Not sure what you mean ,
are you asking did the license start calculate when email received ?
If that so , i guess the answer is NO , you can keep the license for long time as you like .
The Trend Micro's policy is , if your license do not active on any product ,
then your license will never expired .
The license will only be certified active when you install the program and asking you to enter the key number ,
in that moment , your license will start calculate .
But this is only for normal situation , i am not sure the giveaway license also had same policy ,
can't guarantee .
I had already send a support ticket to Trend Micro in my country branch ,
asking how long can we save the license , and is there have any other limit or not .
Still waiting their respond .