Hello there, i recently purchased a 2 year liscense for the nod32 security and anti-virus, firstly i have a question, whats the difference between the Nod32 Anti-virus download and the Nod32 security center? does the security center have the anti-virus built in? secondly when i go to the downloads page and select the v4 security download it takes me to the username and password pop up for authentication, i enter my details i got sent in the E-mail and when i press OK it pops up again and i have to re-enter, everytime i do this it pops up again asking for my username and password and no matter what i do it won't take me to the downloads page so i can actually download it. i've tried to download it on multiple PC's to see if i can actually get to the downloads and everytime i do it keeps asking me for my username and password. any ideas on what the problem could be and how to fix it. I use Nod32 on my other PC but the new liscence is for another one.