I suspect your system restore dinked your registry hack.
I've had limited success with the hack on other machines -- 1 or 2 successes out of 6 or so attempts.
Best thing, really, is to set your drives to AHCI, copy the latest INF to a thumbdrive, load it when prompted and re-install as folks have noted.
I do think one of my successes was on an Asus mobo, though, so maybe you can keep banging away from that end (you would certainly need to redo the hack!)
edit: And yeah . . . Windows does get confused when you move default desktop folders and such.