I purchased nod. I was given a username and password through a email. I use the username and password to download nod32. After downloading nod. I click on "update now". A box pops up with the username already in it. It needs password, so I enter the password. and it says "invalid password" So what's going on here? I was able to download it from eset with the username and password. What's the problem with the update saying "invalid password"?