E-mail hijacked and sending spam to Address Book friends

First thing to do is change ALL (ALL!!! passwords). And use not something like your real name but REAL passwords. 3 letters + 3 numbers or sth like that.
Second thing is DO NOT use old browser like IE 6. Forget it.
Third thing is update everything into oblivion (and browser).
Forth thing is forget "I remove you virus for $20" web sites. They just install nice virus for $20.
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And not so critical, but the most drastic and useful thing is forget windows at all for tasks where security is important. Use Linux/BSD maybe MAC OS.

Use Linux or BSD (maybe MAC OS, but expensive) for security critical tasks.

I posted this before. Call your anti-virus people, let them help you. I paid $99 and Norton fixed it. Took two hours but I do not wish to delete emails etc etc.

I started receiving both emails from myself which then linked to their site AND complaints from all contacts in my address book who had been receiving the same.
It was embarrassing, and I tried approaching MSN, the Pharm Mall et al, to no avail. Then I noticed that a brand new addition to my address book also received an email from them, so it was obvious they had real time hacking into the main MSN address book data base and hijacked my contact list.
So, apart from moving to another carrier (which I did), I emptied the entire address book, and kept an eye out for emails from myself and 'junked' them.
The Hotmail system recognises familiar email addresses without having to enter them in the address book, so I can still use it by referring to a hard copy first and upon entering only one syllable, an option list of possible addressees comes up, so it is easy if you MUST stay with your carrier.
The result is....I am now TOTALLY CLEAR as are all my contacts.

I have run antivirus, iobit 360 and other antivirus and registry checkers.

My friends get email saying they are from me at yahoo, but MS Outlook does not list them as sent from my computer. Yahoo does not list them in my sent messages folder when I log onto Yahoo mail. I also have a gmail account, but again nothing shows.

I very seldom log onto Yahoo, but use MS Outlook daily. I even set my email to not send automatically. Before I click send mail I check all mail in my outbox to make sure it is legit. Only then do I hit send. I deleted all addresses on Yahoo mail and gmail.com just to make sure.

It is not really coming from my account or my computer. I am sent a copy also since my email is in my address book. My first email address is a total fake, but I do not get a send error back like I normally would. It would appear someone stole my email list then edited out the bad emails like that.

It seems to happen every 2 weeks (only twice so far). Just before it started I was on facebook and my typing was being delayed for some reason. I would type and then a couple of seconds later the characters would appear. Therefore, I suspect someone in facebook found a way to download email lists from facebook users.

I think the emails are coming from somewhere besides my computer but how do I stop it? How can I get someone to track these guys down and arrest them. These bad emails have some strange link that will take you very briefly to a pharacutical add then jumps to a dot ru address. My virus checker stops that action as unsafe, but I am concerned about my friends.

Can anyone help?