Sophos found a trojan
I have Sophos Anti-Virus and today it deteced a trojan. I don't know what to do with it. It's currently in the Quarantine Manager. Sophos knows where it is.
Should I "clean from list" or "clean up threat"? I really don't know what I am doing, this is not my computer, I've borrowed from my school so I can't go to my schools computer support (due to spring break). Please help me!
The trojan name is Troj/PHPDoor-J if it helps.
MacBook Pro, OS X Mavericks (10.9.2)