I can only navigate the Internet in Safe Mode with Networking. I have run AVG (found nothing); Spybot (54 viruses found and removed); Malwarebytes (found nothing); Ad Aware (74 cookies removed); Kaspersky Online Scan (2 Trojan viruses found attached to two music files, which I deleted. When I realized I should have saved the log but hadn't, I ran Kaspersky again, but it found nothing the second time); Disk Cleanup and Defrag. I also installed ERUNT, NTREGOPT, TFC, OTL, Hijack This and Rooter (I was only able to attach the Rooter log; OTL was too large to attach to this e-mail, and I got a message that I wasn't allowed to "upload this type of file" when I tried to attach the Hijack This log). Let me know if you need this, and I'll attempt to send it in a separate e-mail).
Hopefully with the logs, someone out there can tell me what to do! It seems like I've tried everything in these forums!