Unpredictable BSOD on emachine desktop

[AcumenProbitas]

Helping a friend of mine with tech support. The computer has been suffering from random reboots for a few days with the BSOD, log attached.

 

[koolkat77]

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

Microsoft Security Essentials - Microsoft Windows

Malwarebytes Free​

• :info: Do not start the trial version of MalwareBytes
  
  

You may also take a look at:

Good & Free System Security Combination​

Make scans with -

TDSSKiller Rootkit Removal Utility Free Download | Kaspersky Lab US

Online Virus Scanner Eset​

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​

Monitor hardware temperature with system monitoring software like Speccy or HWMonitor:

Piriform - Speccy

CPUID - HWMonitor​

Upload a screenshot using:

CrystalDiskInfo​

:tip: For how to upload a screenshot or file, read here

Test your Hard Drive by running:

Hard Drive Diagnostic Procedure​

Test and Diagnose RAM Issues with Memtest86+:

RAM - Test with Memtest86+​

:info: Pay close attention to part 3 of the tutorial "If you have errors"

   Tip

• :tip: Test the RAM with Memtest86+ for at least 7-10 passes. It may take up to 22 passes to find problems. Make sure to run it once after the system has been on for a few hours and is warm, and then also run it again when the system has been off for a few hours and is cold.

Bugcheck

[FONT="Lucida Console"]Built by: 7601.18113.amd64fre.win7sp1_gdr.130318-1533
Debug session time: Wed Jul 17 05:13:46.989 2013 (UTC + 6:00)
System Uptime: 0 days 0:12:50.454
BugCheck 50, {fffff902c1da046c, 0, fffff960001078fa, 5}
Probably caused by : win32k.sys ( win32k!RGNOBJ::bMerge+42 )
BUGCHECK_STR:  0x50
PROCESS_NAME:  explorer.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 7601.18113.amd64fre.win7sp1_gdr.130318-1533
Debug session time: Wed Jul 17 05:00:06.425 2013 (UTC + 6:00)
System Uptime: 0 days 0:01:54.891
BugCheck 3B, {c0000005, fffff80002eaaff3, fffff88008164a20, 0}
Probably caused by : memory_corruption ( nt!MmCopyToCachedPage+223 )
BUGCHECK_STR:  0x3B
PROCESS_NAME:  WerFault.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 7601.18113.amd64fre.win7sp1_gdr.130318-1533
Debug session time: Wed Jul 17 04:52:41.916 2013 (UTC + 6:00)
System Uptime: 0 days 0:08:44.382
BugCheck A, {fffffa8202ef5d00, 2, 1, fffff80002ee396c}
*** WARNING: Unable to verify timestamp for SYMEFA64.SYS
*** ERROR: Module load completed but symbols could not be loaded for SYMEFA64.SYS
Probably caused by : SYMEFA64.SYS ( SYMEFA64+fd3da )
BUGCHECK_STR:  0xA
PROCESS_NAME:  MRT.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 7601.18113.amd64fre.win7sp1_gdr.130318-1533
Debug session time: Tue Jul 16 09:08:58.384 2013 (UTC + 6:00)
System Uptime: 0 days 0:15:39.881
BugCheck D1, {fffffa82054aeef8, 2, 1, fffff880043bdb3d}
*** WARNING: Unable to verify timestamp for atikmdag.sys
*** ERROR: Module load completed but symbols could not be loaded for atikmdag.sys
Probably caused by : dxgmms1.sys ( dxgmms1!VIDMM_GLOBAL::UnreferenceDmaBuffer+7d )
BUGCHECK_STR:  0xD1
PROCESS_NAME:  explorer.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 7601.18113.amd64fre.win7sp1_gdr.130318-1533
Debug session time: Tue Jul 16 08:52:41.867 2013 (UTC + 6:00)
System Uptime: 0 days 0:06:38.333
BugCheck 1A, {5003, fffff70001080000, 1ff0, 119e009}
Probably caused by : ntkrnlmp.exe ( nt! ?? ::FNODOBFM::`string'+45f7d )
BUGCHECK_STR:  0x1a_5003
PROCESS_NAME:  mscorsvw.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 7601.18113.amd64fre.win7sp1_gdr.130318-1533
Debug session time: Fri Jul 12 23:02:21.399 2013 (UTC + 6:00)
System Uptime: 0 days 0:40:59.339
BugCheck A, {fffffa8204479740, 2, 1, fffff80002c94432}
Probably caused by : ntkrnlmp.exe ( nt!KeRemoveQueueEx+582 )
BUGCHECK_STR:  0xA
PROCESS_NAME:  lsass.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``[/FONT]