I struggled with this trojan for hours, I couldn't find a way to install any antivirus prgrms or even do a online scan to get the %&*! off. Nothing would work, even in safe mode, I even tried to map a drive to the infected vista from my XP to scan with malwarebytes from the healthy xp machine, but ofcourse I ran in to access roadblocks there as well. Just when I thought I was going to have to pull the hard drive and scan it from another pc, I tried simply renaming the exe files for both malwarebytes and hijackthis, and ta-dah! they both worked! Don't know if any other newbie's out there knew about this trick so I thought I'd share!