I installed the trial version of bitdefender total security and found it really light and working flawlessly so i decided to buy one. bought BDTS 2012 3 days back, initially had troubles installing the keys! as it kept saying that the entered keys were 'invalid' and somehow i seek'd the help from my friend who got my antivirus pack registered with the given key. finally its a sigh of relief for me that the pack i bought is working, now despite it kept saying that the keys are invalid at the start. now that the Bitdefender total security 2012 is working fine, i ve successfully registered it and created a bitdefender account using my email ID and password. am not able to upgrade it to Bitdefender total security 2013. i followed the instructions as mentioned and yet am not able to upgrade as it keeps asking me for a fresh key where i type the same key and still it does not accept as it keeps saying 'invalid keys'. in the instruction u said that it ll 'remember' the keys that pack got registered so it ll get upgraded. i tried both the methods and yet no luck! please do advice where am getting it wrong. hoping for an early reply. i ve been breaking ma head with the pack for the past 4 days! 
otherwise i really love this BDTS as it is so light and runs without an issue!
