My macbook pro 15 mid2010, crash every time in the last month. What can i do? Is a hardware or software problem?

Question

The problem is that my mac is working very well, in soft programs, like browser or text editing, and then stop. Stop for one eternity, until i do a hard shut down.
After this situation apper´s many times, in a single day, i went to a apple service store and left my mac to repair. At first, the tecnhical manager told me that happens a lot, and the problem are in the logic board. Well, when i pick up the mac, he told me that was a software problem and was solved with the instalation of 10.8.5, but in that same day, he crash 3 or 4 times, in different way´s. Now, he crash´s and restart alone, and at the first try don´t restart appearing one message on the grey screen.
I don´t know what is this problem.
Someone have or had this problem too?
What is the solution?
Thanks a lot...

Answer 1

Maybe find a local who can translate for you. I don't know what to tell you for dealing in another country for service on your computer.
I can offer you something you can do if you want to give it a try. You'll need a backup of your data in your Home folder because you need to erase the drive. You'll also need a solid, preferably fast, internet connection.
Install or Reinstall Lion/Mountain Lion from Scratch
Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.
Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Erase the hard drive:
  1. Select Disk Utility from the main menu and click on the Continue button.
  2. After DU loads select your startup volume (usually Macintosh HD) from the
      left side list. Click on the Erase tab in the DU main window.
  3. Set the format type to Mac OS Extended (Journaled.) Optionally, click on
        the Security button and set the Zero Data option to one-pass. Click on
      the Erase button and wait until the process has completed.
  4. Quit DU and return to the main menu.
Reinstall Lion/Mountain Lion: Select Reinstall Lion/Mountain Lion and click on the Install button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible
            because it is three times faster than wireless.