u can try this anti virus called antivir
download link :
http://www.download.com/AntiVir- ... 45.html?tag=lst-0-1
sometime if able to detect trojan but cant delete, remember the trojan nameand try this way
ctrl+alt+delete, select "process", search the trojan name and end process, then re-scan
cuase soemtime it cant delete while the trojan is running.