Hello there!
Seems like there are lot of random crashes with different causes. First uninstall your Avast and replace it with Microsoft Security Essentials.
Run Hardware Diagnostic (RAM and hard Drive) Hardware Diagnostic | Captain Debugger
Run SFC Scan SFC /SCANNOW Command - System File Checker
Since there are traces of Direct X error you need to do a Driver Cleanup follow this guide nVidia Driver Cleanup Guide | Captain Debugger it works for both nVidia and ATI.
BSOD BUGCHECK SUMMARY
Code:
Loading Dump File [C:\Documents and Settings\Shyam\_jcgriff2_\dbug\__Kernel__\082812-22370-01.dmp]
Built by: 7601.17835.amd64fre.win7sp1_gdr.120503-2030
Debug session time: Wed Aug 29 01:15:06.989 2012 (GMT+6)
System Uptime: 0 days 17:02:12.832
BugCheck 24, {1904fb, fffff8800c252918, fffff8800c252170, fffff880012bb555}
Probably caused by : Ntfs.sys ( Ntfs!NtfsFindPrefixHashEntry+22c )
DEFAULT_BUCKET_ID: VISTA_DRIVER_FAULT
PROCESS_NAME: svchost.exe
BUGCHECK_STR: 0x24
FAILURE_BUCKET_ID: X64_0x24_Ntfs!NtfsFindPrefixHashEntry+22c
Bugcheck code 00000024
Arguments 00000000`001904fb fffff880`0c252918 fffff880`0c252170 fffff880`012bb555
BiosVersion = 0402
BiosReleaseDate = 11/16/2011
SystemManufacturer = System manufacturer
SystemProductName = System Product Name
MaxSpeed: 3300
CurrentSpeed: 3399
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Loading Dump File [C:\Documents and Settings\Shyam\_jcgriff2_\dbug\__Kernel__\082712-20576-01.dmp]
Built by: 7601.17835.amd64fre.win7sp1_gdr.120503-2030
Debug session time: Tue Aug 28 08:11:20.101 2012 (GMT+6)
System Uptime: 1 days 10:54:08.944
BugCheck 1A, {41284, 1693b001, 639b, fffff70001080000}
Probably caused by : ntkrnlmp.exe ( nt! ?? ::FNODOBFM::`string'+4ac3 )
BUGCHECK_STR: 0x1a_41284
DEFAULT_BUCKET_ID: VISTA_DRIVER_FAULT
PROCESS_NAME: chrome.exe
FAILURE_BUCKET_ID: X64_0x1a_41284_nt!_??_::FNODOBFM::_string_+4ac3
Bugcheck code 0000001A
Arguments 00000000`00041284 00000000`1693b001 00000000`0000639b fffff700`01080000
BiosVersion = 0402
BiosReleaseDate = 11/16/2011
SystemManufacturer = System manufacturer
SystemProductName = System Product Name
MaxSpeed: 3300
CurrentSpeed: 3399
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Loading Dump File [C:\Documents and Settings\Shyam\_jcgriff2_\dbug\__Kernel__\082612-21231-01.dmp]
Built by: 7601.17835.amd64fre.win7sp1_gdr.120503-2030
Debug session time: Sun Aug 26 21:16:01.296 2012 (GMT+6)
System Uptime: 0 days 11:42:46.869
BugCheck 3B, {c0000005, fffff8000328da26, fffff880089015b0, 0}
Probably caused by : ntkrnlmp.exe ( nt!ExfReleasePushLock+56 )
DEFAULT_BUCKET_ID: VISTA_DRIVER_FAULT
BUGCHECK_STR: 0x3B
PROCESS_NAME: chrome.exe
FAILURE_BUCKET_ID: X64_0x3B_nt!ExfReleasePushLock+56
Bugcheck code 0000003B
Arguments 00000000`c0000005 fffff800`0328da26 fffff880`089015b0 00000000`00000000
BiosVersion = 0402
BiosReleaseDate = 11/16/2011
SystemManufacturer = System manufacturer
SystemProductName = System Product Name
MaxSpeed: 3300
CurrentSpeed: 3399
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Loading Dump File [C:\Documents and Settings\Shyam\_jcgriff2_\dbug\__Kernel__\082412-23665-01.dmp]
Built by: 7601.17835.amd64fre.win7sp1_gdr.120503-2030
Debug session time: Sat Aug 25 10:15:34.411 2012 (GMT+6)
System Uptime: 2 days 3:42:51.254
BugCheck 1A, {5003, fffff70001080000, c425, c42700018848}
Probably caused by : ntkrnlmp.exe ( nt! ?? ::FNODOBFM::`string'+29dcf )
BUGCHECK_STR: 0x1a_5003
DEFAULT_BUCKET_ID: VISTA_DRIVER_FAULT
PROCESS_NAME: chrome.exe
FAILURE_BUCKET_ID: X64_0x1a_5003_nt!_??_::FNODOBFM::_string_+29dcf
Bugcheck code 0000001A
Arguments 00000000`00005003 fffff700`01080000 00000000`0000c425 0000c427`00018848
BiosVersion = 0402
BiosReleaseDate = 11/16/2011
SystemManufacturer = System manufacturer
SystemProductName = System Product Name
MaxSpeed: 3300
CurrentSpeed: 3399
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Loading Dump File [C:\Documents and Settings\Shyam\_jcgriff2_\dbug\__Kernel__\081212-28095-01.dmp]
Built by: 7601.17835.amd64fre.win7sp1_gdr.120503-2030
Debug session time: Mon Aug 13 00:12:18.237 2012 (GMT+6)
System Uptime: 3 days 2:23:58.120
BugCheck 24, {1904fb, fffff88003393488, fffff88003392ce0, fffff80003076d73}
*** WARNING: Unable to verify timestamp for win32k.sys
*** ERROR: Module load completed but symbols could not be loaded for win32k.sys
Probably caused by : Ntfs.sys ( Ntfs!NtfsDeleteScb+108 )
PROCESS_NAME: System
BUGCHECK_STR: 0x24
DEFAULT_BUCKET_ID: NULL_CLASS_PTR_DEREFERENCE
FAILURE_BUCKET_ID: X64_0x24_Ntfs!NtfsDeleteScb+108
Bugcheck code 00000024
Arguments 00000000`001904fb fffff880`03393488 fffff880`03392ce0 fffff800`03076d73
BiosVersion = 0402
BiosReleaseDate = 11/16/2011
SystemManufacturer = System manufacturer
SystemProductName = System Product Name
MaxSpeed: 3300
CurrentSpeed: 3399
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Loading Dump File [C:\Documents and Settings\Shyam\_jcgriff2_\dbug\__Kernel__\062512-23930-01.dmp]
Built by: 7601.17835.amd64fre.win7sp1_gdr.120503-2030
Debug session time: Mon Jun 25 22:34:24.289 2012 (GMT+5)
System Uptime: 1 days 22:11:52.184
BugCheck 3B, {c0000005, fffff88004691b31, fffff880070bca90, 0}
Probably caused by : dxgkrnl.sys ( dxgkrnl!DXGDEVICE::DestroyAllocations+ad )
DEFAULT_BUCKET_ID: VISTA_DRIVER_FAULT
BUGCHECK_STR: 0x3B
PROCESS_NAME: chrome.exe
FAILURE_BUCKET_ID: X64_0x3B_dxgkrnl!DXGDEVICE::DestroyAllocations+ad
Bugcheck code 0000003B
Arguments 00000000`c0000005 fffff880`04691b31 fffff880`070bca90 00000000`00000000
BiosVersion = 0402
BiosReleaseDate = 11/16/2011
SystemManufacturer = System manufacturer
SystemProductName = System Product Name
MaxSpeed: 3300
CurrentSpeed: 3399
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Loading Dump File [C:\Documents and Settings\Shyam\_jcgriff2_\dbug\__Kernel__\062512-20966-01.dmp]
Built by: 7601.17835.amd64fre.win7sp1_gdr.120503-2030
Debug session time: Tue Jun 26 01:13:21.277 2012 (GMT+6)
System Uptime: 0 days 0:29:01.495
BugCheck 1A, {41790, fffffa8000d82130, ffff, 0}
Probably caused by : ntkrnlmp.exe ( nt! ?? ::FNODOBFM::`string'+355e4 )
BUGCHECK_STR: 0x1a_41790
DEFAULT_BUCKET_ID: VISTA_DRIVER_FAULT
PROCESS_NAME: firefox.exe
FAILURE_BUCKET_ID: X64_0x1a_41790_nt!_??_::FNODOBFM::_string_+355e4
Bugcheck code 0000001A
Arguments 00000000`00041790 fffffa80`00d82130 00000000`0000ffff 00000000`00000000
BiosVersion = 0402
BiosReleaseDate = 11/16/2011
SystemManufacturer = System manufacturer
SystemProductName = System Product Name
MaxSpeed: 3300
CurrentSpeed: 3399
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Loading Dump File [C:\Documents and Settings\Shyam\_jcgriff2_\dbug\__Kernel__\062512-15943-01.dmp]
Built by: 7601.17835.amd64fre.win7sp1_gdr.120503-2030
Debug session time: Tue Jun 26 00:43:02.701 2012 (GMT+5)
System Uptime: 0 days 1:49:27.918
BugCheck 1A, {41790, fffffa8000ef2830, ffff, 0}
Probably caused by : ntkrnlmp.exe ( nt! ?? ::FNODOBFM::`string'+355e4 )
BUGCHECK_STR: 0x1a_41790
DEFAULT_BUCKET_ID: VISTA_DRIVER_FAULT
PROCESS_NAME: nvSCPAPISvr.ex
FAILURE_BUCKET_ID: X64_0x1a_41790_nt!_??_::FNODOBFM::_string_+355e4
Bugcheck code 0000001A
Arguments 00000000`00041790 fffffa80`00ef2830 00000000`0000ffff 00000000`00000000
BiosVersion = 0402
BiosReleaseDate = 11/16/2011
SystemManufacturer = System manufacturer
SystemProductName = System Product Name
MaxSpeed: 3300
CurrentSpeed: 3399
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Loading Dump File [C:\Documents and Settings\Shyam\_jcgriff2_\dbug\__Kernel__\061912-17191-01.dmp]
Built by: 7601.17835.amd64fre.win7sp1_gdr.120503-2030
Debug session time: Wed Jun 20 08:36:46.169 2012 (GMT+5)
System Uptime: 1 days 4:02:19.386
BugCheck 1A, {3452, 2567000, fffff700010dac48, 8f6000018343bc66}
Probably caused by : ntkrnlmp.exe ( nt! ?? ::FNODOBFM::`string'+356c3 )
BUGCHECK_STR: 0x1a_3452
DEFAULT_BUCKET_ID: VISTA_DRIVER_FAULT
PROCESS_NAME: svchost.exe
FAILURE_BUCKET_ID: X64_0x1a_3452_nt!_??_::FNODOBFM::_string_+356c3
Bugcheck code 0000001A
Arguments 00000000`00003452 00000000`02567000 fffff700`010dac48 8f600001`8343bc66
BiosVersion = 0402
BiosReleaseDate = 11/16/2011
SystemManufacturer = System manufacturer
SystemProductName = System Product Name
MaxSpeed: 3300
CurrentSpeed: 3399
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``