Backdoor.Win32.Troffer.2, see gen comp security

Hi Amateur, sorry not to have replied sooner but have been battling (or trying to) that trojan. After downloading numerous scanning programs, all of which reported the computer clean, definitely no trojans, I decided to reformat and reimage. Kaspersky just kept reporting the same trojan each time I logged on - I clicked Delete, and next time the same. I just hope that is the end of it. I sent the file it was supposed to be in, to Kaspersky Lab, and they reported that file as clean. Of course, I am aware that these pesky blighters can hide themselves very well, but I will never really know. The problem with DSS was that each time I tried to download it, the download button was greyed out. But other programs downloaded fine, amongst them were Trojan Hunter, and Malwarebytes Anti Malware. Anyway many thanks for your interest. I hated having to give in and reformat because I always say reformatting is the last resort, but I think I ran out of scanning programs to try!