Does anyone else get random loading at times? Doesn't happen very often, I think this is the actual first time I've noticed it. But it's like it's loading, but the HD doesn't sound like the usual loading just smaller faster *dits* (that's the best I can describe the sound as). Happens for like 5 mins and then completely stops. I'm assuming this is some kind of a background defrag process or something? Anyone get this/know what it is?