Technical,
I also ran a scan with a² Free Malware Scanner and all was clean. 
This scanner can be downloaded at http://forum.a-2.org/viewtopic.php?t=173 with info about it at http://www.a-2.org/en/. 
Do you - or anybody else - nows anything more about a² (a squared) Free Malware Scanner?
Does it has a resident (guard) protection?
Could it be used simultaneously with avast?
How does it update?
I did some research on their forum pages and the features could be;
# Background Guard with IDS
The Background Guard of a² personal has several jobs. Each started program will be scanned and blocked if necessary before it gets active. The IDS (Intrusion Detection System) is always active and protects the operating system. For example, it is able to protect other program-tasks against shutdowns initiated by Trojans. The improper bypassing of desktop firewalls by tunneling through the browser can also be prevented.
# Advanced IDS
The Advanced IDS mode is a component of a² personal which analyses the behavior of all running programs to detect harmful actions. If a program shows a Malware like behavior, the actions will be stopped. You have nearly no configuration work.
# System-Firewall
Expert users can optional choose to use the System-Firewall of a² personal instead of the Advanced IDS mode. This works similar to common desktop firewalls. But the big difference is, that not only connections to the web are monitored. Also operations inside the operating system and the programs are watched. You can define special rights for each program. For example you can deny a specific program to write an autorun entry to the system registry or deny access to a specific part of the harddisk for another program.
I'm afraid that there is something 'wrong' and don't smell so good in all of this... Do avast users can say something...
