Trojans basically can’t be repaired as unlike a virus, which puts a small piece of code in files it infects (which may be able to be repaired) a trojan is entirely malicious so nothing to repair.

If it keeps reappearing after moving it to the chest or deletion, then there are other elements to the infection, so I suggest you try the tool that Spiritsongs gave the link for.

You could also do a forum search for Win32:Delf-HWS and see there are any other topics, which there probably are.