Every couple mins Laptop keeps rebooting after flashing an error msg

My laptop auto reboots after a couple minutes each time I start it up. Blue screen with Error message is full screen: This came back from a bugcheck, may help you:
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kd>
CRITICAL_OBJECT_TERMINATION (f4)
A process or thread crucial to system operation has unexpectedly exited or been
terminated.
Several processes and threads are necessary for the operation of the
system; when they are terminated (for any reason), the system can no
longer function.
Arguments:
Arg1: 00000003, Process
Arg2: 8a3c1020, Terminating object
Arg3: 8a3c1194, Process image file name
Arg4: 805c77d0, Explanatory message (ascii)

Debugging Details:
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unable to get nt!KiCurrentEtwBufferOffset
unable to get nt!KiCurrentEtwBufferBase

PROCESS_OBJECT: 8a3c1020

IMAGE_NAME: csrss.exe

DEBUG_FLR_IMAGE_TIMESTAMP: 0

MODULE_NAME: csrss

FAULTING_MODULE: 00000000

PROCESS_NAME: csrss.exe

EXCEPTION_CODE: (NTSTATUS) 0xc0000005 - The instruction at "0x%08lx" referenced memory at "0x%08lx". The memory could not be "%s".

BUGCHECK_STR: 0xF4_C0000005

CUSTOMER_CRASH_COUNT: 10

DEFAULT_BUCKET_ID: COMMON_SYSTEM_FAULT

STACK_TEXT:
f259fd00 805c6901 000000f4 00000003 8a3c1020 nt!KeBugCheckEx+0x1b
f259fd24 805c787b 805c77d0 8a3c1020 8a3c1194 nt!PspCatchCriticalBreak+0x75
f259fd54 8053ca48 8a3c1268 c0000005 0103ebcc nt!NtTerminateProcess+0x7d
f259fd54 7c90e514 8a3c1268 c0000005 0103ebcc nt!KiFastCallEntry+0xf8
WARNING: Frame IP not in any known module. Following frames may be wrong.
0103ebcc 00000000 00000000 00000000 00000000 0x7c90e514


STACK_COMMAND: kb

FOLLOWUP_NAME: MachineOwner

FAILURE_BUCKET_ID: 0xF4_C0000005_IMAGE_csrss.exe

BUCKET_ID: 0xF4_C0000005_IMAGE_csrss.exe

!process ffffffff8a3c1020 3
GetPointerFromAddress: unable to read from 80557e34
PROCESS 8a3c1020 SessionId: none Cid: 02ac Peb: 7ffdf000 ParentCid: 026c
DirBase: 12e6a040 ObjectTable: e1a60830 HandleCount:
Image: csrss.exe
VadRoot 89ed3980 Vads 111 Clone 0 Private 316. Modified 3126. Locked 0.
DeviceMap e1004470
Token e1a8cb98
ReadMemory error: Cannot get nt!KeMaximumIncrement value.
ffdf0000: Unable to get shared data
ElapsedTime 00:00:00.000
UserTime 00:00:00.000
KernelTime 00:00:00.000
QuotaPoolUsage[PagedPool] 61228
QuotaPoolUsage[NonPagedPool] 5272
Working Set Sizes (now,min,max) (872, 50, 345) (3488KB, 200KB, 1380KB)
PeakWorkingSetSize 1348
VirtualSize 23 Mb
PeakVirtualSize 39 Mb
PageFaultCount 4410
MemoryPriority BACKGROUND
BasePriority 13
CommitCharge 391
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I have a laptop HP Pavillion running Windows XP Prof version 2002 SP2, AMD Athlon(tm) XP Processor 2800+, 1.60GHz, 1.25 GB RAM

How do I find out what's causing the shut down?

Thank you, Marcel

Hi, your Hard Drive is corrupted/ damaged , same with Windows installation.

Please try to reinstall Windows and let me know if you still have problems.

I did not know the Hard Drive could be corrupt and still work fine in Safe Mode.... thanks
However, I do not have a Windows disc.

Hi, you really have to reinstall your Windows. That's only way, get your disc or find new one.

It could be HDD or OS. We should perform Windows re-installation first, after that, if all works, problem is solved.
If you have more problems, it could be HDD.