You're welcome.
Thanks for the clear response! Now for some more ideas:
lylock700 wrote: ... Repair disk permission ( if this is the instruction u were saying) ... when it's done i restarted my mac ...
(1) This is the instruction I posted in the first item of my previous reply. However, It might be important that you restart Mac before repairing permissions, NOT afterward as you write in your response.
Because you will not be able to refer to these instructions while doing the following, you may want to print these suggestions so you can see them while you are performing them:
• Print these instructions if desired.
• Restart your Mac one more time.
• As soon as the Mac restarts, repair permissions again. Do NOT restart Mac again after repair!
• Download a fresh copy of the http://support.apple.com/kb/DL1581 10.8.2 Combo update
•Do NOT restart Mac after the download. Immediately try to apply the 10.8.2 Combo.
• If the update works, repair permissions again as soon as the Mac restarts at the end of the update.
(2) If the update does not work when you try the above instructions, use OS X's Recovery feature http://support.apple.com/kb/HT4718 to repair your hard drive. Then use your Mac's > Software Update... menu command to see if the 10.8.2 update is needed. If Software Update...shows your software is up to date, your Mac should work,
If Software Update...shows that the 10.8.2 update should be applied, quit Software Update..., restart Mac, and try reapplying the Combo Update again using these instructions.
(3) If nothing we have suggested gets your Mac working properly, reinstall OS X using the http://support.apple.com/kb/HT4718 reinstall directions.