Hi,
I have been having the same problem too. It has been driving me crazy coz recently I had re replace a pair of faulty RAM to get my PC stable. So when I started hitting BSOD randomly even after replacing, imagine my despair

.
I noticed that the BSOD was linked to
1. laptop sitting idle for more than 30mins and accesing local network
2. printing to my network printers (connected to another LAN PC)
3. Norton Ghost (version 12) network backup.
The problem was not there at the beginning, which was about 3-4 months back when I started using Comodo. It started at some point when updates were installed to the OS and WMP11 and IE7 was installed.
I am running WinXP SP2 Pro with complete current update as on Spetember 06, 2007. All drivers are current. Details of the system were collected (complete HW and SW inventory) usng HP Instant support Prof. ed. and attached.
I would be happy to provide more info.
Here is the debug info obtained using WinDbg (version 6.7.005.1):
*******************************************************************************
* *
* Bugcheck Analysis *
* *
*******************************************************************************
Use !analyze -v to get detailed debugging information.
BugCheck A, {16, 2, 0, 804e469a}
*** ERROR: Symbol file could not be found. Defaulted to export symbols for tcpip.sys -
*** ERROR: Module load completed but symbols could not be loaded for cmdmon.sys
Probably caused by : cmdmon.sys ( cmdmon+7e2 )
Followup: MachineOwner
---------
kd> !analyze -v
*******************************************************************************
* *
* Bugcheck Analysis *
* *
*******************************************************************************
IRQL_NOT_LESS_OR_EQUAL (a)
An attempt was made to access a pageable (or completely invalid) address at an
interrupt request level (IRQL) that is too high. This is usually
caused by drivers using improper addresses.
If a kernel debugger is available get the stack backtrace.
Arguments:
Arg1: 00000016, memory referenced
Arg2: 00000002, IRQL
Arg3: 00000000, bitfield :
bit 0 : value 0 = read operation, 1 = write operation
bit 3 : value 0 = not an execute operation, 1 = execute operation (only on chips which support this level of status)
Arg4: 804e469a, address which referenced memory
Debugging Details:
------------------
READ_ADDRESS: 00000016
CURRENT_IRQL: 2
FAULTING_IP:
nt!KeSetEvent+30
804e469a 66394616 cmp word ptr [esi+16h],ax
DEFAULT_BUCKET_ID: DRIVER_FAULT
BUGCHECK_STR: 0xA
PROCESS_NAME: System
TRAP_FRAME: f7274c24 -- (.trap 0xfffffffff7274c24)
ErrCode = 00000000
eax=00000001 ebx=c0000100 ecx=850ba484 edx=f0c40600 esi=00000000 edi=00000000
eip=804e469a esp=f7274c98 ebp=f7274ca4 iopl=0 nv up ei pl nz na pe nc
cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00010206
nt!KeSetEvent+0x30:
804e469a 66394616 cmp word ptr [esi+16h],ax ds:0023:00000016=?

Resetting default scope
LAST_CONTROL_TRANSFER: from 804e469a to 804e187f
STACK_TEXT:
f7274c24 804e469a badb0d00 f0c40600 0000003a nt!KiTrap0E+0x233
f7274ca4 f0c2af89 850ba484 00000000 00000000 nt!KeSetEvent+0x30
WARNING: Stack unwind information not available. Following frames may be wrong.
f7274cc8 f0c2b0bd 84d92c18 c000023a 00000000 tcpip!tcpxsum+0xcea1
f7274cf8 f0c0723d 84d92c18 850ba49c 84d92cc8 tcpip!tcpxsum+0xcfd5
f7274d14 804e37f7 84ec8308 84d92c18 84d92cec tcpip!ARPRcv+0xdca
f7274d24 f0bee7e2 f0bfde90 84eacd74 84eacd74 nt!IopfCallDriver+0x31
f7274d38 f0bf5299 84ec8308 84d92c18 00000000 cmdmon+0x7e2
f7274dac 8057cfce 00000000 00000000 00000000 cmdmon+0x7299
f7274ddc 804f88fa f0bf4c80 00000000 00000000 nt!PspSystemThreadStartup+0x34
00000000 00000000 00000000 00000000 00000000 nt!KiThreadStartup+0x16
STACK_COMMAND: kb
FOLLOWUP_IP:
cmdmon+7e2
f0bee7e2 5f pop edi
SYMBOL_STACK_INDEX: 6
FOLLOWUP_NAME: MachineOwner
MODULE_NAME: cmdmon
IMAGE_NAME: cmdmon.sys
DEBUG_FLR_IMAGE_TIMESTAMP: 45bc9111
SYMBOL_NAME: cmdmon+7e2
FAILURE_BUCKET_ID: 0xA_cmdmon+7e2
BUCKET_ID: 0xA_cmdmon+7e2
Followup: MachineOwner
---------
Dear Heroes, Help me! I have already switched to ZoneAlarm (which I dont like at all, but what choice do i have until the issue is resolved?)
Tanveer