OK when I was messing with the cores in my BIOS last night, I'd start the game up and WoW wanted to load to default settings. I of course said no because there wasn't really a hardware switch. But what you're saying now, is to delete WoW and defrag my machine?
Will your method work if I delete WoW, defrag my drive, and then just use the same WoW folder again?
EDIT: I also don't know what folder I'd have to place in the trash can that specifies what hardware I'm using
Although I believe if the config.wtf file is deleted, video settings in the game are reset.
I can also go and mess with the cores again so that I get the pop-up message and actually have the game revert to default settings if you think that may help.