ok. can you disable the sound card in the device manager?  i'm looking for a way to tell if the conflict is what you think it is.

if you can get the machine to stop falling down, maybe you can reassign IRQs or otherwise enable and reinstall the sound card drivers.

It's a D630, the sound card is integrated so I can't remove it.

Fortunately it will boot, it's more of an annoyance than an emergency. The PC would be a pain to rebuild so I'd rather not reimage it unless I have to. Usually I don't bother fixing blue screens as we work with standard images that can be rebuilt in short order.

physically remove the sound card and see if it boots.

also consider that you might be able to disable the sound card from BIOS.  just guessing here because i obviously am not familiar with your machine.

if you know that you have an IRQ conflict, I think the solution would be to change the IRQ assignment of the device that conflicts with the sound card, and then reintroduce the sound card to the system.  let it find it's old assignmenet unconflicted. 

sthda.sys mentioned in the error message is the SigmaTel audio driver. Since this is a laptop, I don't believe it has a sound card that can be removed...

You can try reinstalling the SigmaTel audio driver which you will find here. Follow the instructions at this link to reinstall the driver.

Ron

Edit: Some additional posts appeared before I finished typing, so you already know it has integrated sound.

I'm actually more interested in finding out what the conflicting device is, and how it came to be in conflict.

This laptop was created using a standard image and none of the other laptops are exibiting this problem, this all appeared to happen after we installed Autodesk 2009.

The conflicting device is the SigmaTel audio driver. You should contact Autodesk for their assistance.

Why it became a conflict? Microsoft will point at SigmaTel who'll point at Autodesk who'll point at...

 :D

Ron 

Now I'm getting the following error

IRQL_NOT_LESS_OR_EQUAL (a)
An attempt was made to access a pageable (or completely invalid) address at an
interrupt request level (IRQL) that is too high.  This is usually
caused by drivers using improper addresses.
If a kernel debugger is available get the stack backtrace.
Arguments:
Arg1: fffffffc, memory referenced
Arg2: 0000001c, IRQL
Arg3: 00000000, bitfield :
 bit 0 : value 0 = read operation, 1 = write operation
 bit 3 : value 0 = not an execute operation, 1 = execute operation (only on chips which support this level of status)
Arg4: 80501977, address which referenced memory

READ_ADDRESS:  fffffffc

CURRENT_IRQL:  1c

FAULTING_IP:
nt!MiEliminateWorkingSetEntry+1b
80501977 ??              ???

CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  DRIVER_FAULT

BUGCHECK_STR:  0xA

LAST_CONTROL_TRANSFER:  from 00000000 to 80543a70

STACK_TEXT: 
b47bea80 00000000 fffffffc 0000001c 00000000 nt!ExFreePoolWithTag+0x8a

STACK_COMMAND:  .bugcheck ; kb

FOLLOWUP_IP:
nt!MiEliminateWorkingSetEntry+1b
80501977 ??              ???

SYMBOL_NAME:  nt!MiEliminateWorkingSetEntry+1b

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: nt

DEBUG_FLR_IMAGE_TIMESTAMP:  45e5484a

IMAGE_NAME:  memory_corruption

FAILURE_BUCKET_ID:  0xA_nt!MiEliminateWorkingSetEntry+1b

BUCKET_ID:  0xA_nt!MiEliminateWorkingSetEntry+1b

Followup: MachineOwner

Reboot and press F12 before XP starts to load. Go the Utilitiles partition and run all the hardware tests, including extended hard drive tests.

Did you reinstall the audio driver?

What happens if you boot in Safe Mode? 

Ron 

The problem is intermittant rather than constant. 1 maybe 2 times a day for several days straigh each time with different software running (there is no single obvious cause, like it crashing when program X is run).

I could boot to safe mode and remove the drivers from the frame, but it wouldn't prove much because it might be 6-8 hours between crashes and I can't ask the user to work in safe mode all day.

I've reinstalled the chipset and the drivers and am waiting on the user to see what comes of it, they work off site some of the time so I'm not always in touch with them.

Can you set it up to run something overnight in Safe Mode when nobody needs the PC?

Open XP Event Viewer and click System. See if there are any error messages around the time of the last crash. Then click Applications and look there too. Maybe that'll point you in the right direction.

Ron 

Unfortunately, it's a laptop, it's with a user most of the time. I can only access it sporadically.

Have the user look in the Event Viewer logs for error messages. Maybe you can get it for a weekend?

Did you ever reinstall the audio driver?

Ron