I thank you very much for referring me to CCleaner, I have not seen such a thorough program for free before.
I ran it, cleaned everything, rebooted, made sure that WoW was 32-bit, and had the same problem yet again.
I really do like CCleaner, thank again for mentioning it.
I am having this exact same problem. I logged into the character that I wanted to play, did not have any other copies of WoW open, and WRobot does not show any processes, even if I hit refresh.