About a week and a half ago, my computer froze and I restarted it and it would only reboot halfway. I then tried several different options in recovery mode (command+R) and nothing worked. I finally just erased the disk memory and was able to reinstall OS X, I lost all my files but the laptop was running smooth again. I started re-downloading some programs and a day later it was running very slow so I restarted it only this time it went to Internet recovery mode. Now when I hit command+R and go to disk utility Macintosh HD is not showing on the left side. It's also not showing up when I try and reinstall the software, which now is Mac OS X Lion rather than Yosemite or Maverick which I had before. My question is this: is there anything I can do to fix this outside of calling Apple Support or going to the Apple Store? Thanks for any advice.