BSOD while tabbing out of Civ 5

Code:

*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************
Use !analyze -v to get detailed debugging information.
BugCheck 50, {fffff82003ae4790, 0, fffff88008e04fd2, 5}
*** WARNING: Unable to verify timestamp for aswMonFlt.sys
*** ERROR: Module load completed but symbols could not be loaded for aswMonFlt.sys
Could not read faulting driver name
Probably caused by : aswMonFlt.sys ( aswMonFlt+4fd2 )
Followup: MachineOwner
---------
2: kd> !analyze -v
*******************************************************************************
*                                                                             *
*                        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: fffff82003ae4790, memory referenced.
Arg2: 0000000000000000, value 0 = read operation, 1 = write operation.
Arg3: fffff88008e04fd2, If non-zero, the instruction address which referenced the bad memory
 address.
Arg4: 0000000000000005, (reserved)
Debugging Details:
------------------
 
Could not read faulting driver name
READ_ADDRESS: GetPointerFromAddress: unable to read from fffff80002ef7100
GetUlongFromAddress: unable to read from fffff80002ef71c0
 fffff82003ae4790 Nonpaged pool
FAULTING_IP: 
aswMonFlt+4fd2
fffff880`08e04fd2 488b4910        mov     rcx,qword ptr [rcx+10h]
MM_INTERNAL_CODE:  5
CUSTOMER_CRASH_COUNT:  1
DEFAULT_BUCKET_ID:  WIN7_DRIVER_FAULT
BUGCHECK_STR:  0x50
PROCESS_NAME:  System
CURRENT_IRQL:  0
TRAP_FRAME:  fffff88003346490 -- (.trap 0xfffff88003346490)
NOTE: The trap frame does not contain all registers.
Some register values may be zeroed or incorrect.
rax=fffff88008e01118 rbx=0000000000000000 rcx=fffff82003ae4780
rdx=fffff88008e1ec00 rsi=0000000000000000 rdi=0000000000000000
rip=fffff88008e04fd2 rsp=fffff88003346620 rbp=0000000000000000
 r8=ffffffffffffffff  r9=fffff88003346678 r10=fffffffffffffe88
r11=fffff8a002ae36e8 r12=0000000000000000 r13=0000000000000000
r14=0000000000000000 r15=0000000000000000
iopl=0         nv up ei ng nz na pe nc
aswMonFlt+0x4fd2:
fffff880`08e04fd2 488b4910        mov     rcx,qword ptr [rcx+10h] ds:fffff820`03ae4790=????????????????
Resetting default scope
LAST_CONTROL_TRANSFER:  from fffff80002d3c5a3 to fffff80002cbfb80
STACK_TEXT:  
fffff880`03346328 fffff800`02d3c5a3 : 00000000`00000050 fffff820`03ae4790 00000000`00000000 fffff880`03346490 : nt!KeBugCheckEx
fffff880`03346330 fffff800`02cbdcae : 00000000`00000000 fffff820`03ae4790 00000000`00000000 fffff8a0`02ae3730 : nt! ?? ::FNODOBFM::`string'+0x43801
fffff880`03346490 fffff880`08e04fd2 : 00000000`00000000 fffff880`010d309e fffffa80`08d50a00 fffffa80`08d50900 : nt!KiPageFault+0x16e
fffff880`03346620 00000000`00000000 : fffff880`010d309e fffffa80`08d50a00 fffffa80`08d50900 fffffa80`08b2eb00 : aswMonFlt+0x4fd2
 
STACK_COMMAND:  kb
FOLLOWUP_IP: 
aswMonFlt+4fd2
fffff880`08e04fd2 488b4910        mov     rcx,qword ptr [rcx+10h]
SYMBOL_STACK_INDEX:  3
SYMBOL_NAME:  aswMonFlt+4fd2
FOLLOWUP_NAME:  MachineOwner
MODULE_NAME: aswMonFlt
IMAGE_NAME:  aswMonFlt.sys
DEBUG_FLR_IMAGE_TIMESTAMP:  518b629b
FAILURE_BUCKET_ID:  X64_0x50_aswMonFlt+4fd2
BUCKET_ID:  X64_0x50_aswMonFlt+4fd2
Followup: MachineOwner
---------
2: kd> lmvm aswMonFlt
start             end                 module name
fffff880`08e00000 fffff880`08e28000   aswMonFlt T (no symbols)           
    Loaded symbol image file: aswMonFlt.sys
    Image path: \??\C:\Windows\system32\drivers\aswMonFlt.sys
    Image name: aswMonFlt.sys
    Timestamp:        Thu May 09 14:47:23 2013 (518B629B)
    CheckSum:         00017A4B
    ImageSize:        00028000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

Uninstall your current antivirus as it is contributing to your BSOD's. Replace with Microsoft Security Essentials & the Free version of Malwarebytes, update and make full scans separately:

Uninstallers (removal tools) for common antivirus software - ESET Knowledgebase

Help protect your PC with Microsoft Security Essentials

Malwarebytes Free

• Do not start the trial version of MalwareBytes
  

You may also take a look at:

Good & Free System Security Combination

Use the System File Checker tool and Run Disk Check:

Repair Windows 7 System Files with System File Checker

Run Disk Check in Windows 7 for Bad Sectors & Errors

Make scans with -

TDSSKiller Rootkit Removal Utility Free Download | Kaspersky Lab US

Online Virus Scanner Eset

Daemon Tools (and Alcohol % software) are known to cause BSOD's on some Win7 systems (mostly due to the sptd.sys driver, although we have seen dtsoftbus01.sys blamed on several occasions). Please uninstall Daemon Tools.

DuplexSecure - FAQ

As an alternative, many people recommend the use of Total Mounter or Magic ISO

Reduce items at start up:

Performing a Clean Startup in Windows 7

Add, or Remove Startup Programs in Windows 7

Your Antivirus software is basically whats just needed there.

Hello Raigara, Welcome to Seven Forums

Had a look at your dump at it reports an ox50 bugcheck code BSOD Index PAGE_FAULT_IN_NONPAGED_AREA

And the error is pointing at a faulting driver named aswMonFlt.sys which relates to your Avast anti virus

Its up to you how you want to proceed, it may have been a sporadic error if its only happened once so may be easiest to ignore and see if it occurs again
If it does i would suggest removing avast and installing Microsoft Security Essentials - Microsoft Windows as it will have better stability and compatibility with Win 7

Hope this helps :)

Paul