I just recently got this on my Sony VAIO laptop. Happened about 4 times already. Most recently it was last night. What would happen is the mouse or whatever I'm doing would hang. Then I would get an hour glass. Then I would hear a loud "click" or a "clank" which I'm not sure if it would be the hard drive. Then I would lose control of anything. So, I would do a control+alt+delete and nothing would happen. So I begin to press all the keys down..........then I get a blue screen saying: kernel_data_inpage_error And then like toward the bottom it would say something like beginning dump of physical memory or something like that. Not sure on that error. But this problem is intermittent and can happen sometimes and sometimes be fine. It's just that I hope to not be doing anything important at the time when it does go down. But now, I'm posting this via the same computer which seems to be acting okay now. But, as a precaution, I already backed stuff up to my external 250GB Seagate. Anyone have any tests or anything I could run? I ran HD Tune and it said that my HD's health was fine and no bad sectors. I even did a defrag, ran a virus scan on it, etc. Not sure what else to do.