I'm having very bad luck with computers the last few days. First my Windows 7 bootcamp installation got corrupted, now this. I was using my macbook this morning, no issues whatsoever. I put it in my brief case and go to work (I keep the macbook in a portfolio case and I was very gentle with it) and then take it out to use it and notice the fan is making a screaching/grinding noise. Up until now the fan was 100% silent. I tried using some graphic intensive programs to run it up to 6500rpm to see if that would fix it but that had no effect. Has anybody else had this issue? I haven't heard of any issues with 2012 macbook fans and it seems too soon to be having problems like that. My old 2006 macbook has a noisy fan but that is understandable. What can I do to fix it? Is the fan accessible if I take the bottom cover off? The laptop is out of warranty.