They must have some seriously crappy hard drives in these consoles. I have seen so many posts on the same thing.
Do you use an external or internal to play games?
Mainly my external drive so it's ok at the moment but it won't be long until it fails completely.
I spoke to Ms yesterday and because they sent a replacement console with a different serial last time I have to wait for them to swap my extending warranty. Cheeky gits also asked me for proof of purchase for the extended warranty!