Yep, it's a little $astard. I'll try your fix. I don't understand why Norton 360 isn't catching it.
Go at your own risk. But this site
https://zeustracker.abuse.ch/index.php
tracks zeus bot computers. And shows that the current antivirus detection rate is now below 47%. The writers of viruses are getting pretty sophisticated.
You should consider setting up a regular user account to work out of everyday instead of an administrator account. With win 7, it is no big deal when something needs installing to just enter an administrator username/password to get it installed. But it keeps drive by viruses from infecting your machine because a regular user account would not have install privileges to the registry.
If you are running XP, it is quite a bit more painful since you would have to log in as administrator to do installs then log back in as your everyday account.
And do not let the mac owners fool you. Norton makes a mac version of their software also.
The biggest security holes out there right now are Adobe Flash, Adobe Reader, and Java so make sure you update all of those as soon as you can.