Ok I had this error just the other day to and I was quite pissed off with the fact that you have to send it away to get repaired! SO I was in the process of backing things up and needed to delete a few things b4 I could actually back up the HDD, I deleted everything but the saved games data. Then I thought to myself, I give it one more shot playing MGS4, put the game in, had re-install it, and blow and be-hold, im able to play the game again! Iv had no crashes since re-install and my other game, Ninja Gaiden also works. Please someone else tell me they have done this to and it works for them.