several different & random BSOD Win7

Hello and Welcome !

Seems like dump are pointing to core Windows Files which maybe be the problem. I would recommed few steps.

Uninstall DAEMON Tools Lite completely and remove sptd.sys using this article DuplexSecure - FAQ
Then uninstall AVG completely from Add or Remove Programs and run the Cleanup Tool AVG - Tools download


Bugcheck:

Code:

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*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
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KERNEL_MODE_EXCEPTION_NOT_HANDLED_M (1000008e)
This is a very common bugcheck.  Usually the exception address pinpoints
the driver/function that caused the problem.  Always note this address
as well as the link date of the driver/image that contains this address.
Some common problems are exception code 0x80000003.  This means a hard
coded breakpoint or assertion was hit, but this system was booted
/NODEBUG.  This is not supposed to happen as developers should never have
hardcoded breakpoints in retail code, but ...
If this happens, make sure a debugger gets connected, and the
system is booted /DEBUG.  This will let us see why this breakpoint is
happening.
Arguments:
Arg1: c0000005, The exception code that was not handled
Arg2: 82d2d067, The address that the exception occurred at
Arg3: a5f4faac, Trap Frame
Arg4: 00000000

Debugging Details:
------------------


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

FAULTING_IP: 
nt!ExAllocatePoolWithTag+4b7
82d2d067 897004          mov     dword ptr [eax+4],esi

TRAP_FRAME:  a5f4faac -- (.trap 0xffffffffa5f4faac)
ErrCode = 00000002
eax=070b0623 ebx=8541d140 ecx=986ab0f8 edx=a883e470 esi=8541d288 edi=8541d144
eip=82d2d067 esp=a5f4fb20 ebp=a5f4fb6c iopl=0         nv up ei pl zr na pe nc
cs=0008  ss=0010  ds=0023  es=0023  fs=0030  gs=0000             efl=00010246
nt!ExAllocatePoolWithTag+0x4b7:
82d2d067 897004          mov     dword ptr [eax+4],esi ds:0023:070b0627=????????
Resetting default scope

CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  VISTA_DRIVER_FAULT

BUGCHECK_STR:  0x8E

PROCESS_NAME:  SearchIndexer.

CURRENT_IRQL:  0

LAST_CONTROL_TRANSFER:  from 82e87f5f to 82d2d067

STACK_TEXT:  
a5f4fb6c 82e87f5f 00000001 00000008 49564d43 nt!ExAllocatePoolWithTag+0x4b7
a5f4fb88 82e69671 0012b490 a5f4fbc8 a5f4fbc4 nt!CmpGetValueListFromCache+0x80
a5f4fbec 82e69415 a5f4fc7c a5f4fc2c a5f4fc28 nt!CmpFindValueByNameFromCache+0x47
a5f4fc60 82e88ab1 a88a8528 00000002 0340e5f8 nt!CmQueryValueKey+0x350
a5f4fd14 82c5044a 00000bec 0340e6bc 00000002 nt!NtQueryValueKey+0x312
a5f4fd14 77d664f4 00000bec 0340e6bc 00000002 nt!KiFastCallEntry+0x12a
WARNING: Frame IP not in any known module. Following frames may be wrong.
0340e68c 00000000 00000000 00000000 00000000 0x77d664f4


STACK_COMMAND:  kb

FOLLOWUP_IP: 
nt!ExAllocatePoolWithTag+4b7
82d2d067 897004          mov     dword ptr [eax+4],esi

SYMBOL_STACK_INDEX:  0

SYMBOL_NAME:  nt!ExAllocatePoolWithTag+4b7

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: nt

IMAGE_NAME:  ntkrpamp.exe

DEBUG_FLR_IMAGE_TIMESTAMP:  4c1c3fac

FAILURE_BUCKET_ID:  0x8E_nt!ExAllocatePoo

Hope this helps,
Captain