Well, you could try a "System Restore" to some date preceeding all this and see if that works; but if it doesn''t, I would have to recommend formatting "C" and starting over, unless you can get a better suggestion from someone else.
The reason for this is that "Hard Shutdowns" are likely to damage your HDD(s). I don't know what are the latest methods of their inner workings, but it used to be that HDDs worked something like an old time "Record Player". The "Read Heads" worked like the "Tone Arm" on a record player, reading the platters on the HDD something like the "Needle" on a record player read the record.
The big difference is the "Read Heads", unlike the "Needle", on a record player, are NOT supposed to touch the platters on the HDD. Instead they float just above the platters, (HELD UP THERE BY AN AIR CUSHION GENERATED BY THE SPINNING OF THE PLATTERS), and read the platters magnetically. Now before you shutdown a computer, you are supposed to "PARK" the "Read Heads", - something like putting the tone arm of a record player on its stand. Once the heads are parked it becomes safe to shut down, which collapses the air cushion supporting the Read Heads. BUT if they are out over the spinning platters, air cushion COLLAPSE > HIT > BOUNCE > HIT > BOUNCE > HIT > BOUNCE > SCRAPE SCRAPE