Windows XP Home Service Pack 3 BSOD

I just got the BSOD while running my anti-virus software. When it restarted I ran Windows Debugger and this is what it gave me. I'm thinking that it has something to do with the 2 1GB sticks of DDR RAM I recently installed. Has anyone had an issue with ntkrnlpa.exe before?

Debugging Details:
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BUGCHECK_STR: 0x4E_99

CUSTOMER_CRASH_COUNT: 1

DEFAULT_BUCKET_ID: DRIVER_FAULT

LAST_CONTROL_TRANSFER: from 805141ee to 804f8cb5

STACK_TEXT:
f76e6bb4 805141ee 0000004e 00000099 00000000 nt!KeBugCheckEx+0x1b
f76e6bd4 8051ec6d e28d1e58 ffffffff 8a2cced8 nt!MiRestoreTransitionPte+0x124
f76e6bec 8051f21e 8a780920 805126d5 8a2ccf08 nt!MiRemovePageFromList+0xd1
f76e6bf4 805126d5 8a2ccf08 000004c0 00000420 nt!MiRemoveAnyPage+0x56
f76e6c20 80513210 00008000 8a780980 8a780990 nt!MiResolveMappedFileFault+0x3dd
f76e6c64 805133ca 00000000 06bab000 c0035d58 nt!MiResolveProtoPteFault+0x18c
f76e6ce8 8051d305 e28d1e58 06bab000 c0035d58 nt!MiDispatchFault+0xe8
f76e6d4c 8054051c 00000000 06bab000 00000001 nt!MmAccessFault+0xf9d
f76e6d4c 64209c59 00000000 06bab000 00000001 nt!KiTrap0E+0xcc
WARNING: Frame IP not in any known module. Following frames may be wrong.
026cc290 00000000 00000000 00000000 00000000 0x64209c59


STACK_COMMAND: kb

FOLLOWUP_IP:
nt!MiRestoreTransitionPte+124
805141ee 8b5008 mov edx,dword ptr [eax+8]

SYMBOL_STACK_INDEX: 1

SYMBOL_NAME: nt!MiRestoreTransitionPte+124

FOLLOWUP_NAME: MachineOwner

MODULE_NAME: nt

DEBUG_FLR_IMAGE_TIMESTAMP: 4802516a

IMAGE_NAME: memory_corruption

FAILURE_BUCKET_ID: 0x4E_99_nt!MiRestoreTransitionPte+124

BUCKET_ID: 0x4E_99_nt!MiRestoreTransitionPte+124

Followup: MachineOwner
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kd> lmvm nt
start end module name
804d7000 806cf580 nt (pdb symbols) C:\Program Files\Debugging Tools for Windows (x86)\sym\ntkrnlpa.pdb\30B5FB31AE7E4ACAABA750AA241FF3311\ntkrnlpa.pdb
Loaded symbol image file: ntkrnlpa.exe
Mapped memory image file: C:\Program Files\Debugging Tools for Windows (x86)\sym\ntkrnlpa.exe\4802516A1f8580\ntkrnlpa.exe
Image path: ntkrnlpa.exe
Image name: ntkrnlpa.exe
Timestamp: Sun Apr 13 11:31:06 2008 (4802516A)
CheckSum: 00204E7E
ImageSize: 001F8580
File version: 5.1.2600.5512
Product version: 5.1.2600.5512
File flags: 0 (Mask 3F)
File OS: 40004 NT Win32
File type: 1.0 App
File date: 00000000.00000000
Translations: 0409.04b0
CompanyName: Microsoft Corporation
ProductName: Microsoft® Windows® Operating System
InternalName: ntkrnlpa.exe
OriginalFilename: ntkrnlpa.exe
ProductVersion: 5.1.2600.5512
FileVersion: 5.1.2600.5512 (xpsp.080413-2111)
FileDescription: NT Kernel & System
LegalCopyright: © Microsoft Corporation. All rights reserved.