Wow, thanks to all for the quick and informative replies.
Following Phil’s advice, the Trojan Remover did an excellent job of scraping out the major trojan, which freed up the rest of the system to check out normally.
SpyBot S&D then found another trojan, a bunch of malware, and it all got scrubbed.
Taking the advice of Robin, I will make a restore point after ad-aware finishes, deleting the older versions.
I really like the 9 of you that read this blog. Thanks.