Download and run hijackthis, paste the logfile here
and find the reference to it. Then paste what you've found to us.
It may have any amount of references. Just guessing, I would install CCleaner, boot into safemode and see if you can disable it in processes, services and anywhere else it might be coming from. You might need to disable or stop the process/service first though.
Reading online, it seems to be linked to bitcoins. I would get rid sharpish.