Windows 7 - BSOD at the Welcome screen

[Saurish]

It just came out of no where few weeks ago, I see the welcome screen thing loads for like 10 seconds and then it goes blue, it used to come and go but recently it just BSODing every time.
really hope I can fix this without reinstalling the whole OS.

Got that after I booted in safe mode if it helps with anything:

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 1037

Additional information about the problem:
BCCode: 50
BCP1: ECED0573
BCP2: 00000000
BCP3: 8DABF1F5
BCP4: 00000002
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1

Files that help describe the problem:
C:\Windows\Minidump\062811-26687-01.dmp
C:\Users\Sm\AppData\Local\Temp\WER-41453-0.sysdata.xml

Read our privacy statement online:
Windows 7 Privacy Statement - Microsoft Windows

If the online privacy statement is not available, please read our privacy statement offline:
C:\Windows\system32\en-US\erofflps.txt

System Spec:
Windows 7 Ultimate 32bit
C2D e6600
2GB RAM
Radeon x1950XT

the OS is about a year old, and the hardware is around 5 years old.

I've attached the Zip file, I couldnt get the other HTML file since it gave me some not found error (I was in safe mode when I tried this).

Thanks, Saurish.

 

[yowanvista]

An Avast software(Avast Antivirus/internet security) is the cause, please remove such software and use MSE

*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

PAGE_FAULT_IN_NONPAGED_AREA (50)
Invalid system memory was referenced.  This cannot be protected by try-except,
it must be protected by a Probe.  Typically the address is just plain bad or it
is pointing at freed memory.
Arguments:
Arg1: 94a80000, memory referenced.
Arg2: 00000000, value 0 = read operation, 1 = write operation.
Arg3: 8db0b1f5, If non-zero, the instruction address which referenced the bad memory
    address.
Arg4: 00000000, (reserved)

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


Could not read faulting driver name

READ_ADDRESS: GetPointerFromAddress: unable to read from 829a4718
Unable to read MiSystemVaType memory at 82984160
 94a80000 

FAULTING_IP: 
Aavmker4+21f5
8db0b1f5 8a0e            mov     cl,byte ptr [esi]

MM_INTERNAL_CODE:  0

CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  VISTA_DRIVER_FAULT

BUGCHECK_STR:  0x50

PROCESS_NAME:  ashServ.exe

CURRENT_IRQL:  0

TRAP_FRAME:  945f7ac0 -- (.trap 0xffffffff945f7ac0)
ErrCode = 00000000
eax=94a80000 ebx=033179c0 ecx=00000000 edx=9a9bc202 esi=94a80000 edi=98400428
eip=8db0b1f5 esp=945f7b34 ebp=945f7b50 iopl=0         nv up ei ng nz na pe nc
cs=0008  ss=0010  ds=0023  es=0023  fs=0030  gs=0000             efl=00010286
Aavmker4+0x21f5:
8db0b1f5 8a0e            mov     cl,byte ptr [esi]          ds:0023:94a80000=00
Resetting default scope

LAST_CONTROL_TRANSFER:  from 828825f8 to 828c18e3

STACK_TEXT:  
945f7aa8 828825f8 00000000 94a80000 00000000 nt!MmAccessFault+0x106
945f7aa8 8db0b1f5 00000000 94a80000 00000000 nt!KiTrap0E+0xdc
WARNING: Stack unwind information not available. Following frames may be wrong.
945f7b50 8db0bda6 9a9bc2c8 03348c00 829a4702 Aavmker4+0x21f5
945f7b98 8db09f20 86412428 85708490 857bcbe0 Aavmker4+0x2da6
945f7bfc 828784bc 857bcbe0 86412428 86412428 Aavmker4+0xf20
945f7c14 82a79eee 85708490 86412428 86412498 nt!IofCallDriver+0x63
945f7c34 82a96cd1 857bcbe0 85708490 00000000 nt!IopSynchronousServiceTail+0x1f8
945f7cd0 82a994ac 857bcbe0 86412428 00000000 nt!IopXxxControlFile+0x6aa
945f7d04 8287f42a 00000174 00000000 00000000 nt!NtDeviceIoControlFile+0x2a
945f7d04 77bb64f4 00000174 00000000 00000000 nt!KiFastCallEntry+0x12a
022782cc 00000000 00000000 00000000 00000000 0x77bb64f4


STACK_COMMAND:  kb

FOLLOWUP_IP: 
Aavmker4+21f5
8db0b1f5 8a0e            mov     cl,byte ptr [esi]

SYMBOL_STACK_INDEX:  2

SYMBOL_NAME:  Aavmker4+21f5

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: Aavmker4

IMAGE_NAME:  Aavmker4.SYS

DEBUG_FLR_IMAGE_TIMESTAMP:  4517f7cc

FAILURE_BUCKET_ID:  0x50_Aavmker4+21f5

BUCKET_ID:  0x50_Aavmker4+21f5

Followup: MachineOwner
---------

 

[Saurish]

Avast has been removed, and there are no more blue screens!

Thanks alot!