What do you mean by "force quit?" Was it a "force quit" the process or "force quite by turning power off?"
When you ran the Disk Utility, did you verify the boot volume or repair it?
If this were to happen to me, I would try repairing the volume (if I hadn't tried already). If that didn't work, I'd repartition, reinstall fresh, and restore from my latest backup.
There may be other solution to try before the drastic, but that would be my path to recovery.