Help, my email account sending out mass emails by itself!

[Unit076]

Hello all, I'm a newbie here (and also a computer newb). I got this problem and when I asked for help in a forum, they said I should post my problem here instead for more helpful suggestions/solutions. Anyway...

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For some reason, my Yahoo! Mail account have been sending out mass emails to everyone on my contact list.

I wouldn't have known about it if I didn't got some failure notices for contacts that have been de-activated (and because my friend asked me about the email. He said it links to some kind of viagra site... or something)

And nothing appears in my "sent" folder.

I've changed my password, but just in case if it happen again...

What to do?

Here's the MBAM Log file

mbam-log-2011-05-31 (20-53-08).txt

[screen317]

Hi and welcome to Malwarebytes.

In the future, please post all logs directly into your reply instead of attaching them.

Please update MBAM, run a Quick Scan, and post its log.

Next, download DDS by sUBs and save it to your Desktop.

Double-click on the DDS icon and let the scan run. When it has run two logs will be produced, please post only DDS.txt directly into your reply.

[screen317]

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