Trojan help

[Vorna]

found out ive got a Trojan know that its a TrojanDownloader.Win32.Agent.ae
and know where it is but dont know how to get rid of it... cant simply delete as when u right click the only options are to extract or copy it.

Neway wat im trying to say is....
HELP!!!!!! uke:

 

[Litmus]

http://www.grisoft.com/us/us_index.php free anti-virus

 

[plomien]

www.free-av.com another free antivirus