UNMOUNTABLE_BOOT_VOLUME - Windows XP won't start

  mpearo 16:44 20 Jan 2008


PC switched itself off and now will not re-start windows. Gets as far as the windows XP logo but then switches off and starts the boot process again.

Just before it failed there was an error message saying 'process or thread unexpectedly exited or has been terminated, restart your computer' the file it was referring to was windowsroot/system32/ntoskrn

Won't let me start in safe mode either but i disabled the auto re-boot option and get the blue screen with a message stating:


The technical Info is 0x000000ed (0x86f42bf0, 0xc0000006, 0x00000000, 0x00000000)

I ran chkdsk /r using my windows disc but it has not resolved it.

Does anyone have any idea how to deal with this ?

Many Thanks

  Switcher 16:50 20 Jan 2008

I had this and it turned out to be a memory problem.

  rawprawn 17:26 20 Jan 2008

If you can't find another way, this is what I suggest
click here

  DieSse 17:38 20 Jan 2008

Microsoft troubleshooting guide for this error

click here

  mpearo 17:58 20 Jan 2008

Hi Switcher,

I just tried swapping out the RAM but the PC still has the same problem unfortunately. - Thanks anyway

  mpearo 18:08 20 Jan 2008

Thanks - tried the chkdsk /r option but no change.

What exactly does fixboot do / is there any risk of damage to my data ?

Failing that i'll try rawprawns suggestion

  woodchip 18:19 20 Jan 2008

You need to start with XP disc at Command Prompt type

  mpearo 19:24 20 Jan 2008

thanks woodchip - is there any risk to my data if i do fixboot or fix mbr ?

  mpearo 21:37 21 Jan 2008

Thanks all - turned out to be a problem with the hard drive.

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