Any partitioning program would have simply removed C without touching the factory recover partition! The clean not clean all command once C was the selected volume would have been the best move leaving the recovery partition intact if not having 7 media since you would need that to be present to make up a recovery disk.
As for the 0xc00000e9 error that's an installation error not hardware issue there. Back when many were seeing that was from a bad burn to disk of the 7 Beta or RC builds. A dirty lens in the optical drive, finger marks on the media used, etc. can also end with errors like that.
As for the unbootable device error that is the result of no longer having any boot information as well as boot loader for an OS on the drive. For a drive totally raw you would only see a flashing dash in the upper corner of the screen when trying to boot from it. Once you have 7 back on however you wouldn't see that unless the need for the Startup repair tool came for some other reason.