Re: The dreaded BSOD
Back up all of your important data first. Using the manufacturer's utility, check the hard drive utility. If I'm not mistaken, HP liked to use either WD or Fujitsu drives. You want to get a reading of the S.M.A.R.T. values. If the drive fails any of the S.M.A.R.T. tests, you want to look into replacing the drive.
Test the memory using Memtest86. IF there are any failures, test one module at a time until you find the culprit. My money is on bad RAM.
A BSOD is almost always a hardware issue. Until you can eliminate faulty hardware, I wouldn't bother with reinstalling the OS.
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