I have Avast Home running with all updates but it fails to pick up a program called loader.exe which is classified by the Kapersky online virus scanner as Trojan-Downloader.Win32.Small.aod. ???
If you are sure it’s the virus not detected by avast you can send it to virus@avast.com in a password protected archive with password added of course. To be sure check it here too: http://virusscan.jotti.dhs.org/ If it’s still detected, send virus to avast!.