Poppie, it depends on how severe the threat is when it will be added.
Alwill will add detection for the most dangerous thing first.
And keep in mind that it always is to the user to keep his/her system clean.
Applications like avast! and some others can help, but don't forget knowledge and common sense.
Those are the most important.
Can you please tell us how/where you got that malware from?
Downloading illegal software/music/movies?