Here are the three logs
These are my reports from HijackThis, ComboFix, and AVG Anti-spyware. After I ran Panda Antirootkit, it didn't tell me about any dangers or problems - it seemed to be diagnosing a clean bill of health. SmitFraudfix seemed to get rid of the Security Toolbar, and also got rid of the Win32.Trojandownloader.Zlob which Ad-Aware 2007 was detecting earlier (but was unable to quarantine or remove). After that, I've seen no signs of infection and noticed no new problems... start-up was slower than normal, but I think that was because AVG was auto-updating. Questions: are there any other things I should do? I've seen a few people mention that they changed their passwords. Should I change passwords? Which ones? Also, which settings (as far as auto-protect, auto-update, etc.) do you recommend for my various spyware software (SSandD, AVG, AD-Aware)