Please run it 3 different times, for best results. I unfortunately am not skilled enough to understand whats in the CBS log though. I will say though if sfc/scannow can't really fix system files within 3 times, then a windows 7 disc would be the best option. Although i don't think you will need to go that far.
At the bottom of the CBS log it states "2012-08-21 03:14:44, Info CSI 00000367 [SR] Verify and Repair Transaction completed. All files and registry keys listed in this transaction have been successfully repaired" and there seems to be a lot of keys, so i would say the scan did offer benefits