If you've got some good antivirus then put the virus in quarantine, or the antivirus will, then you can delete it from there. However if you have no antivirus and you know the virus file then you can delete it using shift+del, dont use delete as some viruses activate once in the recycling bin, shift+del will simply delete it permanently. Anitvirus is recommended though because you may accidentaly delete an infected file, which the computer needs.