so, that took a lot longer to rebuild than i want to see happen again. i was multitasking by sorting through shows...
i ran a full chkdsk this morning in addition to the reformat. i reinstalled. and, i copied the known good back over, with the updated files.
i'm going to take yet another nap, because i never really fully recovered from that event yesterday. then, i'm going to get something to eat and take a shower when i get up. and, if everything is fine, i should boot into a stable install that i intend to be on for the next several days.