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!