SYSTEM CRASHED BOOTED INTO MAC OSX BASE SYSTEM WEBKIT HELP!!!!

MY SYSTEM CRASHED AFTER AN UPDATE. RAN A BACK TRACE LOG BECAUSE A GREY SCREEN BOOTED UP WITH ONLY SAFARI INSIDE. BACK TRACE LOG SHOWED A WEBKIT SAFARI OS X INSTALLED AND HAVE PERMISSIONS OVER MY STARTUP DISK REPLACING IT WITH THEIR "MAC BASE OS X SYSTEM" AS WELL AS MY RECOVERY HD TOO. HOWEVER I AM ABLE TO GET INTO DISK UTIL AND REPAIRED MY HD AND RECOVERY HD HOWEVER THE OTHER IS STILL THERE AND WILL NOT LET ME ERASE IT. IT STATES IN INFO OF THE DRIVE "NOT ALLOW OWNERS TO TURN OFF...YES". I AM IN THE SAFARI BROWSER NOW AFTER LEAVING DISK UTIL. DISK UTIL READ MY HD IS FIXED AND OK AND WILL BOOT HOWEVER I AM SCARED IT WILL ONLY BOOT INTO WHATEVER THIS WEBKIT MAC OS X BASE IS.