#0 - Dec. 23, 2009, 4:44 a.m.
Authenticator Attached Please Lock
#5 - Dec. 23, 2009, 6:57 a.m.
These two stickies should prove helpful. I'd also recommend doing your scans with the launcher open and some junk entry in the account ID. We've seen some nasty keyloggers pop up lately that don't want to show on scanners unless the launcher is active.
I also highly recommend changing your email password once you are certain your system is secure. They don't need into a system once they can dip into an inbox.
Computer Security Recommendations
http://forums.worldofwarcraft.com/thread.html?topicId=1778038509&sid=1
Account Compromise Info Center
http://forums.worldofwarcraft.com/thread.html?topicId=14318909866&sid=1
You may also want to look into getting an authenticator for your account. It's no substitute for good security habits, but it will keep anyone else out of your WoW account. Not to mention core hounds make adorable pets!
Blizzard Store
http://us.blizzard.com/store/browse.xml?f=c:6
Mobile Authenticator
http://us.blizzard.com/support/article.xml?locale=en_US&articleId=26109
I do wish you all the very best.