I'm still in the process of working this all, but I figured I'd give an update to how things are going. Sorry, I seem to be a little slow when it comes to all of this.
I tried running SuperAntiSpyware in safe mode, and it took ages, but it found roughly 700 things, and then when I tried to clean them, it told me to reboot - so I did, and then the computer did reboot, but nothing happened. I looked in the quarantine, but found nothing. So then I ran SuperAntiSpyware in normal mode, and it found only around 400 things, but I did quarantine and delete them.
I ran BitDefender, and the process bar was about an hour and a half into it, halfway through, and then a pop-up forced it to close, (they're getting really nasty!) It did manage to delete a lot, since I believe that BitDefender deletes the problems in real-time when they're found, and not at the end in one big swoop. Is that right?
Anyway, I've restarted the BitDefender and I'm going to let it run overnight. Once that finishes up, should I then try to use Hijack This, or try to re-work SuperAntiSpyware in some way? Thanks, guys.
Sorry again for all the unusual problems on my side, I'm trying my hardest, though!