Doing some research, I have found many others with similar issues with Panda.
Some were successful using a regedit process.
I do not recommend this, because you can "brick" your system (or nearly so; "bork" at least!).
Others were sucessful by booting into "Safe Mode" and then removing.
For safe mode... On power up, pres f8. this will give you a screen where you can choose "Safe Mode", "Safe Mode with Networking" etc. Choose "Safe Mode".
If neither of these methods are comfortable for you, (and I do not recommend the regedit process, even though Panda support has walked some people through this process), then I would suggest you pose your question in the Virus and Malware forum, and see if our malware experts are up-to-date on an easy way to do it. Broni, or Bobbye, (or ???) may have a quick solution for you. There is normally a backlog and it may take a while for them to get to your request.
I have a thought on how we might proceed but I strongly suspect a regedit may still be required, and I would rather put you in the hands of folks that regularly write scripts for regedits, instead of risking your making a mistake. regedits require great care!