How to Remove MSIL5.AWAT Trojan from Computer?

I have recently potentially been infected with MSIL5 trojan horse. I did a number of scans with various tools but could not find anything decisive... How can I get rid of the infections? Thanks in advance!

What is MSIL5.AWAT?

MSIL5.AWAT is regarded as a dangerous Trojan horse that damages the infected systems seriously. It is often distributed via freeware, shareware, strange links, peer-to-peer files, attachments from suspected or spammed emails, etc. Besides, it can be embedded onto the corrupt or compromised websites. Please be careful if you are redirected to suspected sites when browsing the web and remember not to click any links or ads on them.