Hello ckb0118,
Only the two latest dumps are of any real use as the others are too old, I did however check the most recent before the two latest and the cause was identified to be the same Memory Corruption, not necessarily bad RAM as the process name in two out of the three crashes implicated your AV protection AVG, namely avgcsrvx.exe
*******************************************************************************
* *
* Bugcheck Analysis *
* *
*******************************************************************************
MEMORY_MANAGEMENT (1a)
# Any other values for parameter 1 must be individually examined.
Arguments:
Arg1: 00005003, The subtype of the bugcheck.
Arg2: c0802000
Arg3: 0000c90b
Arg4: 0cabf206
Debugging Details:
------------------
TRIAGER: Could not open triage file : e:\dump_analysis\program\triage\modclass.ini, error 2
BUGCHECK_STR: 0x1a_5003
DEFAULT_BUCKET_ID: VISTA_DRIVER_FAULT
PROCESS_NAME: avgcsrvx.exe
CURRENT_IRQL: 0
LAST_CONTROL_TRANSFER: from 82c6ca58 to 82cda9df
STACK_TEXT:
8fd6fca4 82c6ca58 0000001a 00005003 c0802000 nt!KeBugCheckEx+0x1e
8fd6fcdc 82ca6eb0 c00e21b8 83fdfd08 00000000 nt!MiAllocateWsle+0x7d
8fd6fd4c 82c5ad84 00000001 1c437000 00000001 nt!MmAccessFault+0x1d40
8fd6fd4c 77a89373 00000001 1c437000 00000001 nt!KiTrap0E+0xdc
WARNING: Frame IP not in any known module. Following frames may be wrong.
1b7be1b4 00000000 00000000 00000000 00000000 0x77a89373
STACK_COMMAND: kb
FOLLOWUP_IP:
nt!MiAllocateWsle+7d
82c6ca58 cc int 3
SYMBOL_STACK_INDEX: 1
SYMBOL_NAME: nt!MiAllocateWsle+7d
FOLLOWUP_NAME: MachineOwner
MODULE_NAME: nt
DEBUG_FLR_IMAGE_TIMESTAMP: 57095140
IMAGE_NAME: memory_corruption
FAILURE_BUCKET_ID: 0x1a_5003_nt!MiAllocateWsle+7d
BUCKET_ID: 0x1a_5003_nt!MiAllocateWsle+7d
See my canned text below for what I suggest,
AVG is a known hog on system resources and will slow your computer down, it is also not as good an AV protection as it once was and using an alternative free AV that offers very good protection and is also light on system resources is recommended, Avast or MSE would be what I would suggest.
Uninstall AVG using the proper removal tool from here
Avast! free from the Authors site option here or MSE from here
When you post back can you tell us how many sticks of RAM you have please, just in case it also needs testing.