Interesting you are having this problem. I just spent a good portion of the weekend dealing with the IRQ message as well as a bad_pool_header message.
I've been running a pretty bullet dual boot system with vista ultimate and win xp pro on a home built dual core machine for some time without problem. Vista is on a 250gb WD drive and XP is on a 400gb Seagate. Both very good and pretty new drives.
What I had noticed was slow boot times for the Vista partition not just routine slower Vista times but noticeably slower times. Sometimes it would take re-starting the machine about 4-5 times to get up and running. I typically keep the machine running all the time when I am at home but I also travel for a living so the machine might be shut down for periods of 1-5 days. The starting began to occur over the period of the last couple of weeks.
I then started to get chkdsk errors stating a problem with system volume information on assorted partitions I have for storing acronis image backups when I was in XP.
So I decided to see if restoring XP images might be the cause. Turned out it wasn't but was still getting the error message. Downloaded Seagate tools suspecting a drive failing in process but the tools gave the drive a clean bill of health.
After much playing and also losing the dual boot from playing with various images, I decided to bite the bullet and reinstall XP from scratch. Reformatted the partition and now with SP3 available was up and running in fairly short order. Also installed the system drivers. Now 2 days later and after re-installing much software on the XP partition I'm error-free.
The only thing new on the XP partition before all this started was moving to AVG 8 which is now back on the XP partition and seems to be working fine.
Don't know if this helped, but that's my story and I'm sticking to it <g>.
Best of luck on your saga. The most obvious next step for you would be to delete the Norton and run something else for a while to see what happens. From my research the errors you see can be from hardware of software but I couldn't find anything that led to a fix.
Keep us posted.
-------------- Original message --------------
From: "RB838" < rb838%40yahoo.com">rb838
yahoo.com>
> I'm having a problem replying to responses to Vince's answers. I
> read his message and click reply to group and the message comes back
> and says you can't use html so I had to post another message.
>
> He asked whether the computer boots up with the drive connected.
> Here's my response but I have some additional info.
>
> With the drive connected or disconnected the computer boots up fine.
> And thanks for the info on SP3.
>
> Now every time I try to scan using my Norton program -- the blue
> screen appears and says the problem is --
> DRIVER_IRQL_NOT_LESS_OR_EQUAL with the following:
>
> STOP: 0X000000D1 (0XF79466E6, 0X00000002, 0X00000000, 0XF79466E6)
>
>
> *** mxopswd.sys - ADDRESS F79466E6 base at F7941000, DATESTAMP
> 459efd59
>
> When I follow the thread to what's being sent to Microsoft -- this
> is what is sent:
>
> C:DOCUME~1my name ~1LOCALS~1temp5a9a_appcompat.txt
>
> I ran Dell Diagnostics CD110910 and the program, when completed,
> said everything is running correctly -- no problems -- but the
> computer works for a while, then crashes. Sometimes it runs for
> hours unattended, then when I go back to use it -- the blue screen
> is up with the same message. Or -- when I try to run Norton scan --
> the scan starts and then the blue screen pops up with the message
> shown above. Should I consider getting a new hard drive for my Dell
> 8250 or is there a fix? Thanks.
>
>
>
>
>
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