Currently Being ModeratedMar 16, 2013 6:22 AM (in response to SenoKittu)
Just reinstall OS X.
It's very simple back eveerything up with time machine to an external hard drive first.
Currently Being ModeratedMar 16, 2013 6:28 AM (in response to SenoKittu)
Cleaning up <sigh>. Macs don't need to be "cleaned". First delete that third party utility and make sure you delete all associated files. Use the uninstaller that came with it, or go to their site to find where all the files are located.
Then try re-installing the 10.8.3 Combo update.
If that doesn't work boot into Recovery Mode and re-install OS X
Boot up holding command-r keys into your Recovery Volume.
The screen should give you these choices...
Restore from TM backup
Reinstall Mac OS X
Get help online
First run Disk Utility Repair Disk, if you get errors run until no errors reported or reports "the disk cannot be fixed". Then, choose Reinstall OS X. This will be an install "in place" and shouldn't effect any of your own data or settings.