Blue Screen with IRQL_GT_Zero...

Welcome to the forum.
Please remove Norton for the time being. It is a known cause of BSOD's. Use MSE in its place.

Recommended antivirus software for Windows 7 based on stability compared to others:-

• Microsoft Security Essentials Download | Free Spyware Protection
• Malwarebytes - The Free version
• Good & Free System Security

   Warning

Do not start the free trial of Malware Bytes; remember to deselect that option when prompted.

Scan with Kaspersky TDSSKiller:

• Anti-rootkit utility TDSSKiller

ESET online scanner:

• Free Online Virus Scanner | ESET

Please update these older drivers. Links are included to assist in looking up the source of the drivers. If unable to find an update, please remove (un-install) the program responsible for that driver. DO NOT manually delete/rename the driver as it may make the system unbootable!:-

SCDEmu.SYS Sun Mar 15 16:30:00 2009 (49BCD8A8)
PowerISO Virtual Drive driver
Driver Reference Table - SCDEmu.SYS

MBfilt64.sys Fri Jul 31 09:40:32 2009 (4A7267B0)
Realtek HiDefinition Audio driver (file labelled as Creative Audio Driver) - Was found in the latest Win8 version available from Realtek on 07Sep2013
Driver Reference Table - MBfilt64.sys

NTIOLib_X64.sys Mon Jan 6 12:15:54 2014 (52CA4A1A)
MSI Afterburner driver (known BSOD issues with Windows) Also found to be a part of MSI Live Update 5
Driver Reference Table - NTIOLib_X64.sys

NvStreamKms.sys Thu May 22 22:43:14 2014 (537E2922)
nVidia Streaming Kernel service - may cause BSOD in Win8.1 systems (found in May 2014). Date/TimeStamp: Tue Apr 29 20:59:44 2014 (53604B00) MAY NOT BE A PROBLEM, this is a tenative posting
Driver Reference Table - NvStreamKms.sys

To perform a clean install of a driver, follow this tutorial:

• How to Clean Left Over Driver Files with Driver Sweeper

Use Revo Uninstaller to uninstall stubborn software. Opt for Advance Mode while uninstalling which allows you to remove leftover registry:-

• Download Revo Uninstaller Freeware - Free and Full Download - Uninstall software, remove programs, solve uninstall problems

Run the System File Checker that scans the of all protected Windows 7 system files and replaces incorrect corrupted, changed/modified, or damaged versions with the correct versions if possible:

• How to Repair Windows 7 System Files with System File Checker

Check for heating issues using Speccy or HWmonitor

Upload a screen shot:

• Screenshots and Files - Upload and Post in Seven Forums

Run Disk Check on your hard disk for file system errors and bad sectors on it:

• How to Run Disk Check in Windows 7

Code:

Built by: 7601.18409.amd64fre.win7sp1_gdr.140303-2144
Debug session time: Thu Jun 26 03:10:42.946 2014 (UTC + 6:00)
System Uptime: 0 days 1:12:16.571
BugCheck 4A, {7715180a, 2, 0, fffff8800dbe9b60}
Probably caused by : ntkrnlmp.exe ( nt!KiSystemServiceExit+245 )
BUGCHECK_STR:  RAISED_IRQL_FAULT
PROCESS_NAME:  KillerService.
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 7601.18409.amd64fre.win7sp1_gdr.140303-2144
Debug session time: Mon Jun 23 23:52:13.622 2014 (UTC + 6:00)
System Uptime: 0 days 0:06:18.262
BugCheck A, {0, 2, 1, fffff80002493c3f}
*** WARNING: Unable to verify timestamp for SYMNETS.SYS
*** ERROR: Module load completed but symbols could not be loaded for SYMNETS.SYS
Probably caused by : NETIO.SYS ( NETIO!WfpExpireEntryLru+17 )
BUGCHECK_STR:  0xA
PROCESS_NAME:  nis.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 7601.18409.amd64fre.win7sp1_gdr.140303-2144
Debug session time: Mon Jun 23 06:48:50.594 2014 (UTC + 6:00)
System Uptime: 0 days 0:39:08.108
BugCheck 50, {fffff8800ace8d6d, 1, fffff80002775e09, 0}
Probably caused by : win32k.sys ( win32k!StartDeviceRead+1df )
BUGCHECK_STR:  0x50
PROCESS_NAME:  csrss.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 7601.18409.amd64fre.win7sp1_gdr.140303-2144
Debug session time: Mon Jun 23 06:07:07.343 2014 (UTC + 6:00)
System Uptime: 0 days 1:17:36.968
BugCheck A, {0, 2, 1, fffff8000249dc3f}
*** WARNING: Unable to verify timestamp for SYMNETS.SYS
*** ERROR: Module load completed but symbols could not be loaded for SYMNETS.SYS
Probably caused by : NETIO.SYS ( NETIO!WfpExpireEntryLru+17 )
BUGCHECK_STR:  0xA
PROCESS_NAME:  nis.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 7601.18409.amd64fre.win7sp1_gdr.140303-2144
Debug session time: Mon Jun 23 04:46:49.750 2014 (UTC + 6:00)
System Uptime: 0 days 0:11:52.374
BugCheck A, {0, 2, 1, fffff80002493c3f}
*** WARNING: Unable to verify timestamp for SYMNETS.SYS
*** ERROR: Module load completed but symbols could not be loaded for SYMNETS.SYS
Probably caused by : NETIO.SYS ( NETIO!WfpExpireEntryLru+17 )
BUGCHECK_STR:  0xA
PROCESS_NAME:  nis.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 7601.18409.amd64fre.win7sp1_gdr.140303-2144
Debug session time: Mon Jun 23 04:34:12.450 2014 (UTC + 6:00)
System Uptime: 0 days 3:10:07.074
BugCheck A, {0, 2, 1, fffff800024dcc3f}
*** WARNING: Unable to verify timestamp for SYMNETS.SYS
*** ERROR: Module load completed but symbols could not be loaded for SYMNETS.SYS
Probably caused by : NETIO.SYS ( NETIO!WfpExpireEntryLru+17 )
BUGCHECK_STR:  0xA
PROCESS_NAME:  nis.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 7601.18409.amd64fre.win7sp1_gdr.140303-2144
Debug session time: Sun Jun 22 04:13:41.353 2014 (UTC + 6:00)
System Uptime: 0 days 0:25:31.978
BugCheck D1, {26, 2, 1, fffff8800141875c}
Probably caused by : NETIO.SYS ( NETIO!NetioCompleteCopyNetBufferListChain+1c )
BUGCHECK_STR:  0xD1
PROCESS_NAME:  EoCApp.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 7601.18409.amd64fre.win7sp1_gdr.140303-2144
Debug session time: Fri Jun 20 03:49:39.590 2014 (UTC + 6:00)
System Uptime: 0 days 3:02:20.215
BugCheck 1000007E, {ffffffffc0000005, fffff960006a0080, fffff88002ca4308, fffff88002ca3b60}
Probably caused by : cdd.dll ( cdd+20080 )
BUGCHECK_STR:  0x7E
PROCESS_NAME:  csrss.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``