Hello Friends, Its observed Nod32 3.0 is asking for username/passwords everytime it updates, it bans the key the next day n claims again for a new user/pass. And u get out on net searching for a new everytime. No Cracks, Fix or Patches have yet been released to overcome this problem. But I'av come across a trick by which Nod32 3.0 is Updating Perfectly and is working fine from last month. I forwarded this trick to my friends to see if its working perfectly everywhere. And WOW !! I did it.. :D
Now, lemi tell u what to do..

Open your Nod32 Window, It may be full version or the Business Edition.
Press F5.
A new window opens, showing settings and options of the package.
At the left panel, you can see a list of Options. Find "Update".
Select it, Go in servers and add "http://eset.ihl5.com/" in the server list and also select this server.
Try Updating now! :P
Enjoy!! ;)