Welcome.
If you are overclocking any hardware, STOP. Reset any changed values back to default.
Running two antivirus software can cause conflicts. Please remove Avast:
Follow this:

Quote: Originally Posted by
writhziden
If you have an SSD, make sure the following are up to date:
- SSD firmware
- BIOS Version
- Chipset Drivers
- Hard disk controller drivers/SATA drivers
- If you have a Marvell IDE ATA/ATAPI device, make sure the drivers are up to date from the Intel site or Marvell site and not from your motherboard/vendor support site.
Perform a System File Check to check the integrity of all protected
Windows 7 :
- Click on the start

- Type CMD on Search
- Left click and Run as Administrator
- Type
Full tutorial here:
Reduce items at start-up. Nothing except anti-virus is required.
Take memtest. Run for 8 passes and test each stick in a know good slot for an additional 6 passes.

Note
Pay close attention to part 3 of the tutorial in order to rule out the faulty stick.

Information
Errors are sometimes found after 8 passes.

Tip
Do this test overnight, before going to bed.
If Memtest86+ does not find any errors with ram run Windows Memory Diagnostics for 7-8 passes following its tutorial:
Let us know the results.
BSOD BUGCHECK SUMMARY Code:
Built by: 7601.18044.amd64fre.win7sp1_gdr.130104-1431
Debug session time: Tue Feb 19 08:45:17.949 2013 (UTC + 6:00)
System Uptime: 0 days 2:20:55.151
Probably caused by : ntkrnlmp.exe ( nt! ?? ::FNODOBFM::`string'+13702 )
BUGCHECK_STR: 0x1a_41201
DEFAULT_BUCKET_ID: WIN7_DRIVER_FAULT
PROCESS_NAME: svchost.exe
FAILURE_BUCKET_ID: X64_0x1a_41201_nt!_??_::FNODOBFM::_string_+13702
CPUID: "Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz"
MaxSpeed: 3200
CurrentSpeed: 3209
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии``
Built by: 7601.18044.amd64fre.win7sp1_gdr.130104-1431
Debug session time: Tue Feb 19 06:22:24.255 2013 (UTC + 6:00)
System Uptime: 0 days 0:18:24.082
Probably caused by : memory_corruption ( nt!MiBadShareCount+4c )
BUGCHECK_STR: 0x4E_99
DEFAULT_BUCKET_ID: WIN7_DRIVER_FAULT
PROCESS_NAME: chrome.exe
FAILURE_BUCKET_ID: X64_0x4E_99_nt!MiBadShareCount+4c
CPUID: "Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz"
MaxSpeed: 3200
CurrentSpeed: 3209
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии``
Built by: 7601.18044.amd64fre.win7sp1_gdr.130104-1431
Debug session time: Tue Feb 19 10:29:58.318 2013 (UTC + 6:00)
System Uptime: 0 days 0:01:12.520
Probably caused by : memory_corruption ( nt!MiDeleteAddressesInWorkingSet+27f )
DEFAULT_BUCKET_ID: WIN7_DRIVER_FAULT
BUGCHECK_STR: 0x50
PROCESS_NAME: AI Suite II.ex
FAILURE_BUCKET_ID: X64_0x50_nt!MiDeleteAddressesInWorkingSet+27f
CPUID: "Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz"
MaxSpeed: 3200
CurrentSpeed: 3209
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии``
Built by: 7601.17944.amd64fre.win7sp1_gdr.120830-0333
Debug session time: Sun Feb 17 17:11:04.974 2013 (UTC + 6:00)
System Uptime: 1 days 0:31:50.801
Probably caused by : Ntfs.sys ( Ntfs!memcpy+1d1 )
DEFAULT_BUCKET_ID: WIN7_DRIVER_FAULT
BUGCHECK_STR: 0x50
PROCESS_NAME: MsMpEng.exe
FAILURE_BUCKET_ID: X64_0x50_Ntfs!memcpy+1d1
CPUID: "Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz"
MaxSpeed: 3200
CurrentSpeed: 3209
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии``
Built by: 7601.17944.amd64fre.win7sp1_gdr.120830-0333
Debug session time: Sat Feb 16 16:38:13.763 2013 (UTC + 6:00)
System Uptime: 1 days 20:15:54.590
Probably caused by : fltmgr.sys ( fltmgr!TreeUnlinkMulti+51 )
DEFAULT_BUCKET_ID: WIN7_DRIVER_FAULT
BUGCHECK_STR: 0x50
PROCESS_NAME: System
CPUID: "Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz"
MaxSpeed: 3200
CurrentSpeed: 3209