Download, unzip and run. If you can find the "toparcadehits" process, right click and you can get the file location. Then you may be able to boot into Safe Mode and delete it.
None of those methods found the root of the problem, but Googling for 'remove toparcadehits' I found that as I use Firefox, I could access it with Ctrl/Shift/A. So I tried it and found it listed as an Extension. Easily got rid of from there.