This is what you should do:
1. Download OnyX (a free maintenance utility).
2. Open OnyX and Click Cancel on these two Alert Panels:
-Cancel the S.M.A.R.T. Box
-Cancel the Startup Volume Box
3. Enter your Password
4. Click on the Cleaning Tab
5. In each tab, execute the command. Check all the boxes in each tab. When its finished in that tab, it will ask you to reboot. Say NO. Go on to the next tab and repeat until all tabs are done. THEN REBOOT.