for bitdefender key installation

first install the setup file.
now give any one of the key,without internet connection.
it wiil show u r registered with this key,but product is not activated.
connect internet,then give ur email and then registered,it shows u ,that u r registered.
now ur key will be invalid after some time.
remove internet connection and then give another key
it will show u valid for 1095 days and this is permanent one.
update and enjoy..........
but never try to register the key on bitdefender websites otherwise it will be blocked.
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this is just due to giving an error in the bitdefender websites that the customer registered with fake or orginal key..............
give thanx if works.....