I have an early 2008 MBP 15inch lying around the office. When I asked why nobody is using it, I was told that the HD keeps dying. Already on the third one. I tried to use it and it keeps hanging and freezes. I heard it was a common problem for that model as it has something to do with the HDD controller not working properly. Has anyone heard of this? Also, I have a 64 gig SSD laying around and I'm wondering if changing it to SSD will fix the problem.