Hello Rob,
This is what the event ID is referring to:
Basically Plug and Play manager could not locate the device after returning
from sleep so it queries the driver The driver in this case Creative (
audio devicemay be reporting that device does not exist, the device falis
to start or respond to a query

It's related to this: Windows Driver Kit: Kernel-Mode Driver Architecture
Handling an IRP_MN_SURPRISE_REMOVAL Request
http://msdn2.microsoft.com/en-us/library/aa489654.aspx

basically we are finding or being able to communicate with the audio
device. It could be driver, it could a the device itself, it could be the
bus,

Thanks,
Darrell Gorter[MSFT]

This posting is provided "AS IS" with no warranties, and confers no rights
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>Thread-Topic: What does this error mean (from Event Viewer)?
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>From: =?Utf-8?B?Um9i?= <Rob@discussions.microsoft.com>
>Subject: What does this error mean (from Event Viewer)?
>Date: Sat, 9 Jun 2007 12:01:03 -0700
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>I use Sleep mode in Vista and on rare occasions (about 2 out of ten times
-
>no pattern seen so far) I would lose sound after the PC wakes up. All
>indications, including those in Device Manager, show normal. I restart the
PC
>and I regain sound again. If I use hibernate mode instead of Sleep mode,
this
>never occurs. I like Sleep mode better as it's a lot quicker to wake up.
>
>In event viewer I noticed an error correlating with the time the wake up
>occurred when sound didn't come on. I've attached two images from the
event
>viewer - links below.
>
>1. http://img355.imageshack.us/img355/8342/ev1nu4.jpg
>
>2. http://img355.imageshack.us/img355/3549/ev2ni3.jpg
>
>Can anyone decipher the meaning of this error? I'd love to be able to
>eliminate losing sound on wake-up.
>