Hi Scott.
Let's get an antivirus program installed on this computer.
Did you uninstall Spyware Doctor? Best to do that first in Add or Remove Programs in your Control Panel.
Download
AVG and Save it to your Desktop.
Double-click on the avg_free~.exe file and follow the prompts to install it, then update AVG, and run a full system scan.
Open HijackThis and click on 'Do a System Scan and Save a Logfile'. Save the logfile and post it here.