Laptop with Win7 restarts every 10-30 minutes, ntoskrnl.exe; Bugcheck code: 0x7F

Hi

I have a recent (about 2 month old) Sony Vaio z128 laptop (sony-asia.com/product/vpcz128gg) with Win7 64bit.

During the 2 month laptop restarted few times.
2 days ago it started to restart randomly every 10-30 minutes.

The error I'm getting on restart from Windows and WhoCrashed are below.
Dumps are attached.

I couldn't identify what driver / device responsible for it.

I have a warranty but it will mean not having my computer for a while and it's not easy as it is my only development / work computer.

Could anyone help me to identify the problem?
Thanks!


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Windows result
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Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7600.2.0.0.256.48
Locale ID: 3081

Additional information about the problem:
BCCode: d1
BCP1: FFFFE4EC39CF4DFD
BCP2: 0000000000000002
BCP3: 0000000000000008
BCP4: FFFFE4EC39CF4DFD
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1

Files that help describe the problem:
C:\Windows\Minidump\112310-61947-01.dmp
C:\Users\xim\AppData\Local\Temp\WER-73570-0.sysdata.xml


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WhoCrashed result
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On Mon 11/22/2010 11:29:26 PM your computer crashed
This was likely caused by the following module: ntoskrnl.exe
Bugcheck code: 0x7F (0x8, 0x80050033, 0x6F8, 0xFFFFF8000308DEC0)
Error: UNEXPECTED_KERNEL_MODE_TRAP
Dump file: C:\Windows\Minidump\112210-12433-01.dmp
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
The crash took place in a standard Microsoft module. Your system configuration may be incorrect, possibly the culprit is in another driver on your system which cannot be identified at this time.



On Fri 11/19/2010 6:13:00 AM your computer crashed
This was likely caused by the following module: ntoskrnl.exe
Bugcheck code: 0xD1 (0xFFFFE4E8AF4DE0EA, 0x2, 0x8, 0xFFFFE4E8AF4DE0EA)
Error: DRIVER_IRQL_NOT_LESS_OR_EQUAL
Dump file: C:\Windows\Minidump\111910-5007-01.dmp
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
The crash took place in a standard Microsoft module. Your system configuration may be incorrect, possibly the culprit is in another driver on your system which cannot be identified at this time.



On Fri 11/19/2010 1:31:46 AM your computer crashed
This was likely caused by the following module: ntoskrnl.exe
Bugcheck code: 0xD1 (0xFFFFE4EA02C8BBEA, 0x2, 0x8, 0xFFFFE4EA02C8BBEA)
Error: DRIVER_IRQL_NOT_LESS_OR_EQUAL
Dump file: C:\Windows\Minidump\111910-12760-01.dmp
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
The crash took place in a standard Microsoft module. Your system configuration may be incorrect, possibly the culprit is in another driver on your system which cannot be identified at this time.



On Fri 11/19/2010 12:59:59 AM your computer crashed
This was likely caused by the following module: ntoskrnl.exe
Bugcheck code: 0xD1 (0xFFFFE4E8BA2BCA26, 0x2, 0x8, 0xFFFFE4E8BA2BCA26)
Error: DRIVER_IRQL_NOT_LESS_OR_EQUAL
Dump file: C:\Windows\Minidump\111910-12792-01.dmp
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
The crash took place in a standard Microsoft module. Your system configuration may be incorrect, possibly the culprit is in another driver on your system which cannot be identified at this time.



On Fri 11/19/2010 12:24:57 AM your computer crashed
This was likely caused by the following module: ntoskrnl.exe
Bugcheck code: 0xD1 (0xFFFFE4EBBB2CC824, 0x2, 0x8, 0xFFFFE4EBBB2CC824)
Error: DRIVER_IRQL_NOT_LESS_OR_EQUAL
Dump file: C:\Windows\Minidump\111910-56191-01.dmp
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
The crash took place in a standard Microsoft module. Your system configuration may be incorrect, possibly the culprit is in another driver on your system which cannot be identified at this time.

Start by removing ZoneAlarm; I suspect that may be the cause for your 7F bugcheck. Here is the removal tool: http://download.zonealarm.com/bin/free/support/cpes_clean.exe

Also, remove AVG with this tool: http://download.avg.com/filedir/util/avg_arv_sup_____.dir/avgremoverx64.exe

Replace it with MSE: http://www.microsoft.com/security_essentials

Install updated Intel Ethernet drivers from here: http://downloadcenter.intel.com/default.aspx?iid=gg_support-EN_01+home_downloadct

While you're there, you might grab some newer WiFi driver as well.

Finally, install updated nVidia drivers from here: http://www.nvidia.com/Download/index.aspx?lang=en-us If the BSODs persist, could you upload a full BSOD report? See these directions: http://www.jcgriff2.com/BSODpostinstructions.html

Zip up the output folder, and upload it to Rapidshare or a similar site.

...Summary of the dumps

Thank you Jonathan!

Removed ZoneAlarm and so far all good.
Will report if anything comes back.

Would you still recommend MSE over free antiviruses, even if it's not crashing anymore?

Thank you, really appreciate your help.