Did you try what Apple tells us at http://support.apple.com/kb/TA23179
Whenever I try to log into my iTunes, i get the error code (-9812. some previous fixes for this issue have been to open the cmd and type in a few commands, but those only work for XP. I am running Vista and am getting very frustrated with iTunes; their support line offers no help. any fixes to this issue would be great.
my PC specs:
Dell Inspiron 521, running windows Vista Home Premium