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Prevent IRQL_NOT_LESS_THAN_EQUAL blue screen

Does anyone know how I can prevent a IRQL_NOT_LESS_THAN_EQUAL blue screen on Microsoft Server 2008?  This server runs a VM in Hyper-V and seemed to crash when our DPM server did its regular backup.  Any thoughts on this?
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I would suggest looking at the memory dump to find the culprit using the debugging tools for windows. One quick solution would be to use a free tool called "Bluescreenview"

http://www.nirsoft.net/utils/blue_screen_view.html

Once you have that info, post the results...
Here's the info I got from BlueScreenView:


==================================================
Dump File         : Mini120411-01.dmp
Crash Time        : 06/12/2011 10:45:07
Bug Check String  : IRQL_NOT_LESS_OR_EQUAL
Bug Check Code    : 0x0000000a
Parameter 1       : 00000000`00001000
Parameter 2       : 00000000`00000002
Parameter 3       : 00000000`00000000
Parameter 4       : fffff800`0169bd90
Caused By Driver  : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+51e90
File Description  : 
Product Name      : 
Company           : 
File Version      : 
Processor         : x64
Crash Address     : ntoskrnl.exe+51e90
Stack Address 1   : 
Stack Address 2   : 
Stack Address 3   : 
Computer Name     : 
Full Path         : C:\Users\robertso\Documents\Mini120411-01.dmp
Processors Count  : 8
Major Version     : 15
Minor Version     : 6002
Dump File Size    : 262,144
==================================================

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Along with the above suggestions, I have had issues with usb devices.  Multifunction printers and external drives.

Often times moving the device from one usb channel to another helps.  

something easy to isolate any way.