I was wondering if anyone could help me figure out what the problem is with my mac. So, a little while ago there were several cases of my macbook somehow waking itself from sleep mode (while the lid was CLOSED) and severely overheating, while the fans would be blasting. It would literally be hot to the touch and the battery would drain itself by the time i discovered it (usually after unpacking my backpack at the end of the day). After about 2-3 instances of this, I saw that my macbook started operating extremely slow, an extremely sharp contrast to how it was right before then--so much that it was practically unusable. On every application, such as using Word or just going on facebook, I would get the spinning wheel like every 5-30 seconds, for like 10-30 seconds at a time. Opening and closing programs was especially difficult. I could barely type on Word because virtually EVERY thing I did caused me to have to wait out the spinning wheel. So, anyway, I used disk utility to repair the drives and I just erased my entire hard drive to see if it would help--I reinstalled OS X using Recovery HD mode (I don't know if using the disk that came with the mac would have made a difference?). However, it is only slightly better now, and that's probably because I deleted EVERYTHING on my mac and freed up virtually all the space. Is there anything else I should be doing or looking at? Does anyone have a clue what could have gone wrong after the instances of severe overheating? Could the overheating have fried or damaged any of the internal components? And if so, which components are likely to have been damaged (CPU, hard drive, logic board?) Should I upgrade the processor, RAM, or change the hard drive? Thanks a million to anyone who can guide me in figuring out the root cause.