It looks like my friend's XP computer is infected with a trojan. When he browses with IE 7 and tries to visit the Malwarebytes site, for example, the page changes to a "this site is unsafe" window and has a popup asking him to scan or ignore. I right-clicked this page today (to see the properties window in order to find the trojan name) and found a name that started with "Y" but I didn't have time to write it down and I have since forgotten it. I did Google the name and found a MS page that described the trojan but was unable to click-through without the "this site is unsafe" window coming up. I was able to run the free A-Squared trojan scan and it found 9 items. We tried to d/l HijackThis but were unable. I know that if I saw the name I would recognise it. Is there a list of trojan names?

I'm trying to get him to update to IE 8 at least and use Firefox for his primary browser but his wife and kids also must use the same machine (they only have this PC). I think that he probably needs to reboot in Safe Mode and then he might be able to d/l HJT to at least get a log started. If we can, which version of HJT should we get?