Try looking at this link and follow the instructions to change the registry value. It is likely related to the Trojan you referenced.
Keep in mind, this involved editing the registry. It is strongly advised to backup the registry before attempting the suggestions in the link.
To backup your registry see:
http://www.sevenforums.com/tutorials/4230-registry-backup-restore.html
POWELIKS Levels Up With New Autostart Mechanism
Thanks. I didn't even realize it was a virus because I figured the scan "must have removed it."
I eventually downloaded some program called ESET or something and ran it a few times. Then after restarting the PC, no more multiple dllhost processes or alerts. But knowing my luck, I probably just jinxed myself. Fingers crossed...
Thanks again for the guidance!