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My HP Pavilion Elite m9400t is booting to a BSOD in normal mode, safe mode, or even System Recovery from the BIOS. When I disable automatic reboot on system failure, I can see that this is the error :

STOP: c000021a {fatal system error}
The initial session process or system process terminated unexpectedly with a status of 0x00000000 (0xc0000034 0x00106e0). 
The system has been shut down.

When I run a diagnostic from the BIOS, i see at failure on the Boot path test. Here is that error :

Error Code  : BIOHD-4
Error : Uninitialized /corrupt boot structure detected.

I don't have a recovery CD, but I have Win7 PC that I can use to make disks or bootable usb drives. I know I should be trying to boot into a recovery mode and run some repair tools, but I don't know how to get there. Any help will be appreciated!!

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It sounds like your system either has bad sectors on the drive, or a corrupted boot sector. Try downloading the Ultimate Boot CD and running some drive diagnostics on it.

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  • I have a bootable Ultimate boot CD. I see a lot of brand specific HD diagnostics in here. Also scary things like "Reset MBR to zero". I have a generic brand HDD, so Im not sure where to go from here. There is one tool that will do a surface scan but that seems fairly irrelevant. Any ideas?
    – Andrew Magill
    Commented Oct 17, 2014 at 3:50
  • You should have the MHDD32 utility on there. That should do it.
    – Tom Damon
    Commented Oct 18, 2014 at 15:18
  • THanks for the reply Tom. When I try to select any drive in MHDD, i see primary controller, secondary controller and PC3000 board, each with no information below. When I try and select 1,3, or 5 and do a scan or init, or most other functions, it says "Drive not ready". Any ideas how to proceed ? I obviously dont have familiarity with this utility. Thanks again for your help !
    – Andrew Magill
    Commented Oct 19, 2014 at 17:41

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