I think you have a relatively benign trojan, mon ami. For what it's worth, I use Avast antivirus/anti-ad/anti-malware, and I swear by it. I can't count the number of times, with McAfee and Norton, that the software would tell me "You just downloaded a virus." Avast, stops the virus, tells me, and gives me a pop-up asking how I want to handle it.