Symantec have a checker & cleaner for those in need.
Be aware that your chances of backtracking are remote to nil, why, because the mydooms are said to build and use a from mail address that you might recognise - see Symantec writeup on the link indicated above.
For those in need of an antivirus - can recommend
AVG, its free for a "home" user and so far (says he touching wood very firmly) over the last 3 or so years its kept things away from my machine - it can be set up to indicate on incoming and outgoing mails that it tested them and which version was used (just in case). At least it give my e-Mail receipiants a little more confidence in my professionality.
Also you home users - a home firewall is to be recommended - as is anti pop-up and anti-spyware (see sticky's at the start of this thread - but those are not the only products!)
