trojan gen 2

How can I remove the virus named by Norton "Trojan.gen.2"  in the file rlph.dll?

Norton says "computer is protect". But it is notified too time, and I am in apprehension!!

I have update to Windows 10.

The file is in

                                   c:\users\claudio\appdata\local\temp\~os7b39\rlph.dll.