Malicious toolkit website 9 attacks and Browser Fingerprinting 3 attack

Recently Norton notified me of 4 attacks:

 

1.  11-10-2012  Two attacks using Malicious Toolkit Website 9 attacks from and ISP located in Germany 178.##

2.  11-12-2012  One similar attack to above

3.  11-18-2012  One Browser Fingerprinting 3 attack from immerity.com that should be avoided.

 

  I perfomred a full NIS 2012 scan, along with a Microsoft Security scan followed by a scan from Fprotect and one by Kaspersky all of which found NO software on my system.  Today, I also ran a Norton Power Erase scan and found nothing as well. 

 

I was worried mostly because this week my master email and the two other email accounts on my cable account had apparently been hijacked and was suspended by my ISP for sending spam mail.

 

To say that I am pleased with Nortons performance is speaking mildly.

 

My question is this then, if all these scanners found nothing, the most likely reason my email accounts were taken was from the addies simply being known to the hackers and a simple password program used?  Or should I look deeper into my system?

 

Thanks