Thanks for your thoughts Crizz44. I used the online bit defender scan (as per the advice in the "Preparation Guide for use before posting a HijackThis Log" before and after the Panda Scan. I understand that different scans pick up different cookies. I have since downloaded Spyware Guard and should try several different scans including Ad-Aware and Spybot to see how it's performing.
If I remember correctly, the BitDefender and Housecall scan was able to eliminate everything it found. It was just the Panda Scan results I couldn't do anything about unless I paid. (Am not employed, rather I'm a home executive at the moment!)