My PC crashed twice today. When I ran CHKDSK and restarted the error report generated advised me to upadte my CD recording software. I did this through HP (Ihave a Pavillion). I have just completed this and the PC seems to be running vwery smoothly. Has any one else encountered this? When I restarted the PC originally (before CHKDSK ran) there was a really loud mechanical whirring noise from the box. Don't know if the two arec onnected.