lately my hp dv 4000 laptop has been getting the blue screen of death with a memory dump error. i just ran Windiag to test the memory and it has passed. the it guy at my dads company said something about an hp diagnostics disk but all i can find online is stuff for their servers, does anyone know where i can find one or a similar program? i have a feeling this is a hard drive problem since it went out a year ago while it was still under warranty and was probably replaced with the cheapest had drive available. also are there any good free hard drive diagnostic programs?