XP BSOD'ing - here is dump file

Have a XP machine that keeps freezing up and/or BSOD'ing. Here is the dump file, any deas?

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Dump File : Mini101112-01.dmp
Crash Time : 10/11/2012 4:44:24 PM
Bug Check String : KERNEL_MODE_EXCEPTION_NOT_HANDLED
Bug Check Code : 0x1000008e
Parameter 1 : 0xc0000005
Parameter 2 : 0xb9eff71d
Parameter 3 : 0xb18e2744
Parameter 4 : 0x00000000
Caused By Driver : atapi.sys
Caused By Address : atapi.sys+a71d
File Description : IDE/ATAPI Port Driver
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 5.1.2600.5512 (xpsp.080413-2108)
Processor : 32-bit
Crash Address : atapi.sys+a71d
Stack Address 1 : ntoskrnl.exe+181a9
Stack Address 2 : MpFilter.sys+d4a2
Stack Address 3 : MpFilter.sys+d061
Computer Name :
Full Path : C:\WINDOWS\Minidump\Mini101112-01.dmp
Processors Count : 2
Major Version : 15
Minor Version : 2600
Dump File Size : 94,208
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