Currently Being ModeratedFeb 15, 2013 12:02 PM (in response to aswedeh)
If you have not already done so, back up your Mac since those symptoms may indicate a failing hard disk drive. It can be replaced, if necessary.
Start your MacBook using its original System Install DVD and run Disk Utility. Repair the disk. Report any errors it finds.MacBooks iMacs iPads AirPorts, OS X Mountain Lion, 28 years Apple!