Toast, as far as I know, it's XP, his OS is (my best Yoda imitiation).
And, I don't think I'll see him 'til Tuesday. I sincerely hope he doesn't try something silly before then. Incidentally, as a word of warning, he mentioned in passing that it was some gambling site he thinks he got it from. I don't know much about them, so I don't have any more details. I think the best advice in surfing the 'Net is just to stay away from questionable game sites and of course, porn sites. You'd think grown, smart people would figure that much out.
Anyhow, what makes a hijacker much more so persnickety than some other kind of virus/malware?