Without wanting to alarm anyone, and it may be completely unrelated, but two fraudulent transactions were made online on my debit card two days ago. I received a call from Halifax who informed me both transactions had not gone through but it was best to cancel my card and get a new one. I've also done a full scan and found nothing. There are a couple of users on another forum, hotukdeals, who have advised their Avast also detected this Trojan when going onto shopping sites.