BSOD - gt zero at system service

• STOP 0x0000004A: IRQL_GT_ZERO_AT_SYSTEM_SERVICE
  Usual causes: Device driver

Security App

Code:

kl1.sys                     Tue Jun 19 19:27:15 2012 (4FE07E33)
klflt.sys                   Tue Mar 26 20:44:59 2013 (5151B46B)
klif.sys                    Tue Mar 26 21:07:33 2013 (5151B9B5)
klim6.sys                   Thu Aug  2 17:09:23 2012 (501A5FE3)
klkbdflt.sys                Mon Sep  3 19:55:35 2012 (5044B6D7)
klmouflt.sys                Mon Sep  3 20:21:58 2012 (5044BD06)
kltdi.sys                   Mon Apr 29 18:07:50 2013 (517E6296)
kneps.sys                   Tue Mar  5 15:09:23 2013 (5135B643)

Crashes indicate Kaspersky being a possible cause. Remove Kaspersky and replace with Microsoft Security Essentials to see if it provides more stability. Uninstallers (removal tools) for common antivirus software

Microsoft Security Essentials and Malwarebytes are recommended from a strict BSOD perspective. They do not cause blue screens on the system as other AV products do.

Microsoft Security Essentials for Windows
MalwareBytes Free

   Information

• Do not start the free trial of MalwareBytes, unselect that option when prompted.
  
  
• Update and make full scans with both separately.

Start up
Keep less stuff at the start-up. Only anti-virus, this helps avoid driver conflicts and improves time to log in to windows.

Performing a Clean Startup
Startup Programs - Change

System Optimisers
Please remove the following software:

Code:

Start Menu\Programs\Advanced SystemCare 6	Public:Start Menu\Programs\Advanced SystemCare 6	Public

This software is a known cause of BSOD's. The windows 7 operating system does not require these registry cleaning software. They often tune-down rather than tune-up and can wreck the OS beyond repair. Microsoft have improved Windows 7 significantly and it is much better at organising and optimising itself than its predecessors.

If you feel the need to use a registry cleaning or optimisation software, most of us recommend the use of Ccleaner but make sure you back up the registry before making letting ccleaner delete anything.

10 Tips on How to Properly Maintain Your Computer

Daemon Tools/Alcohol %

Code:

Start Menu\Programs\DAEMON Tools Lite	Public:Start Menu\Programs\DAEMON Tools Lite	Public

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 the program, then use the following free tool to ensure that the troublesome sptd.sys driver is removed from your system (pick the 32 or 64 bit system depending on your system's configuration): DuplexSecure - FAQ

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

SFC /scannow

1. Click Start
2. In the search box, type Command Prompt
3. In the list that appears, right-click on cmd.exe and choose Run as administrator
4. In the command window that opens, type

Code:

sfc /scannow

5. Hit enter
System File Checker

Disk Check
For errors on your Hard drive(s): Disk Check

Memtest86+
Run Memtest86+ for at least 8-10 passes. It may take up to 20 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.
How to test and diagnose RAM issues with Memtest86+

   Note

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

   Tip

Do this test overnight.

BSOD BUGCHECK SUMMARY

Code:

Debug session time: Sat Jul  6 16:17:20.027 2013 (UTC + 6:00)
Built by: 7601.18113.amd64fre.win7sp1_gdr.130318-1533
System Uptime: 0 days 8:21:30.902
Probably caused by : ntkrnlmp.exe ( nt!KiSystemServiceExit+245 )
BugCheck 4A, {76e0138a, 2, 0, fffff8800c794b60}
BugCheck Info: IRQL_GT_ZERO_AT_SYSTEM_SERVICE (4a)
Bugcheck code 0000004A
Arguments: 
Arg1: 0000000076e0138a, Address of system function (system call routine)
Arg2: 0000000000000002, Current IRQL
Arg3: 0000000000000000, 0
Arg4: fffff8800c794b60, 0
PROCESS_NAME:  explorer.exe
BUGCHECK_STR:  RAISED_IRQL_FAULT
FAILURE_BUCKET_ID:  X64_RAISED_IRQL_FAULT_explorer.exe_nt!KiSystemServiceExit+245
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Debug session time: Fri Jul  5 06:45:08.121 2013 (UTC + 6:00)
Built by: 7601.18113.amd64fre.win7sp1_gdr.130318-1533
System Uptime: 0 days 0:34:46.995
Probably caused by : ntkrnlmp.exe ( nt!KiSystemServiceExit+245 )
BugCheck 4A, {7756138a, 2, 0, fffff88020dc6b60}
BugCheck Info: IRQL_GT_ZERO_AT_SYSTEM_SERVICE (4a)
Bugcheck code 0000004A
Arguments: 
Arg1: 000000007756138a, Address of system function (system call routine)
Arg2: 0000000000000002, Current IRQL
Arg3: 0000000000000000, 0
Arg4: fffff88020dc6b60, 0
PROCESS_NAME:  explorer.exe
BUGCHECK_STR:  RAISED_IRQL_FAULT
FAILURE_BUCKET_ID:  X64_RAISED_IRQL_FAULT_explorer.exe_nt!KiSystemServiceExit+245
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Debug session time: Mon Jul  1 06:25:39.644 2013 (UTC + 6:00)
Built by: 7601.18113.amd64fre.win7sp1_gdr.130318-1533
System Uptime: 0 days 1:23:35.518
Probably caused by : ntkrnlmp.exe ( nt!KiSystemServiceExit+245 )
BugCheck 4A, {76d4138a, 2, 0, fffff8800eac1b60}
BugCheck Info: IRQL_GT_ZERO_AT_SYSTEM_SERVICE (4a)
Bugcheck code 0000004A
Arguments: 
Arg1: 0000000076d4138a, Address of system function (system call routine)
Arg2: 0000000000000002, Current IRQL
Arg3: 0000000000000000, 0
Arg4: fffff8800eac1b60, 0
PROCESS_NAME:  explorer.exe
BUGCHECK_STR:  RAISED_IRQL_FAULT
FAILURE_BUCKET_ID:  X64_RAISED_IRQL_FAULT_explorer.exe_nt!KiSystemServiceExit+245
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Debug session time: Sun Jun 30 08:18:11.593 2013 (UTC + 6:00)
Built by: 7601.18113.amd64fre.win7sp1_gdr.130318-1533
System Uptime: 0 days 1:53:03.886
Probably caused by : ntkrnlmp.exe ( nt!KiSystemServiceExit+245 )
BugCheck 4A, {76f3138a, 2, 0, fffff8800e83fb60}
BugCheck Info: IRQL_GT_ZERO_AT_SYSTEM_SERVICE (4a)
Bugcheck code 0000004A
Arguments: 
Arg1: 0000000076f3138a, Address of system function (system call routine)
Arg2: 0000000000000002, Current IRQL
Arg3: 0000000000000000, 0
Arg4: fffff8800e83fb60, 0
PROCESS_NAME:  explorer.exe
BUGCHECK_STR:  RAISED_IRQL_FAULT
FAILURE_BUCKET_ID:  X64_RAISED_IRQL_FAULT_explorer.exe_nt!KiSystemServiceExit+245
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``