STOP: 0x000000ED occuring every few months

I have a client that got the above message back in October. I went to the MS Knowledge Base and it
said the following:
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UDMA Controller
If your computer uses a UDMA hard disk controller, use the following procedures:
Replace the 40-wire cable with an 80-wire UDMA cable.
In the BIOS settings for your computer, load the 'Fail-Safe' default settings, and then reactivate
the most frequently used options such as USB Support.
Damaged File System
If the second parameter (0xbbbbbbbb) of the Stop error is 0xC0000032, then the file system is
damaged.

If this is the case, restart the computer to the Recovery Console, and then use the chkdsk /r
command to repair the volume. After you repair the volume, check your hardware to isolate the cause
of the file system damage.

To do this, use the following steps:
Start your computer with the Windows startup disks, or with the Windows CD-ROM if your computer can
start from the CD-ROM drive.
When the Welcome to Setup screen appears, press R to select the repair option.
If you have a dual-boot or multiple-boot computer, select the Windows installation that you want to
access from the Recovery Console.
Type the administrator password when you are prompted to do so.

NOTE: If no administrator password exists, press ENTER.
At the command prompt, on the drive where Windows is installed, type chkdsk /r, and then press
ENTER.
At the command prompt, type exit, and then press ENTER to restart your computer.For additional
information about how to use the Recovery Console in Windows XP, click the article number below to
view the article in the Microsoft Knowledge Base:

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I ran chkdsk /r from the recovery console. All was fine until 6 months later when she got the same
error message. I ran chkdsk /r from the recovery console, removed tons of spyware and all was well
again. I got a call from her today and she got the same message. What would keep causing this to
happen? It definetely isnt the UDMA Conroller because I changed the cable and reset the default
motherboard options the first time I worked on the pc and it had no effect.

Could the spyware they are downloading be causing this to happen every few months? Could it be the
hard drive failing?

Tony

 

could be duff ide controller as well as hard drive slightly dodgy
i'd say hard drive as number 1
ide controller as number 2

 

I have a few questions.

What is the Exact Stop Error Code? Is it the same error every single time
or do the errors change? Other than the the stop error code itself, is
there any other writing on the screen which would indicate a possible
problem or give a lead as to the culprit?
Have you detached the hard drive from the computer and attached it to a
known good machine which has updated antivirus DATs and a good spyware
detection program?
Is there ANY non-xp software on the machine? In particular Windows98/SE
or ME? Is the machine using an AMD or Intel based CPU? Which Model CPU is
the machine using? Was the BIOS updated or flashed recently? Was any work
performed on the machine prior to the original instance of the BSOD? If so
what work--including the addition of any new hardware or drivers?
Has there been any Windows updates added prior to the beginining of the
bsod?

 

I did as instructed above Ronnie.
It runs through the CHKDSK is checking volume and completes the process.
When I type EXIT + ENTER, it works fine until i restart the computer without the disk being in the drive.
It starts me all over at the blue screen error message:
UNMOUNTABLE_BOOT_VOLUME
STOP: 0X000000ED (0X85B3DC08, 0XC0000032, 0X00000000, 0X00000000)