1) The crash might have caused inconsistencies in the file system, and to recover from that I suggest you use disk utility like I said.
You should consider it's possible that the Mac crashed because of an hardware problem (most crashes are).
Other than that I have no other suggestion, considering it's just one day data and you have backups the situation isn't as bad as I first thought. Also, FYI, Parallels 7 is no longer supported with updates.
Last edited: Jan 29, 2014