BSOD win 7

Hi and Welcome to SF!

This is pretty straight forward. All of your crashes have the same stop code which is 7F therefore I don't think that this is hardware problem. Stop code 7F is usually caused by 3rd party firewall. In looking through your drivers, I could see Zone Alarm was loaded. Please remove it completely, that program is poorly coded and I haven seen tons of BSODs caused by that.
ZoneAlarm uninstaller - removal tool available

Update this driver if you can:

Code:

EC168x64 EC168x64.sys Wed Oct 17 13:49:35 2007 (4715B07F)

It belongs to DVB-T adapter USB drivers, perhaps you know more about it than me. Driver that more than 2 years old is potentially causing BSODs

BUGCHECK SUMMARY:

Code:

Microsoft (R) Windows Debugger Version 6.12.0002.633 X86
Copyright (c) Microsoft Corporation. All rights reserved.


Loading Dump File [C:\Users\TUANTR~1\AppData\Local\Temp\Rar$DI00.229\081710-32058-01.dmp]
Mini Kernel Dump File: Only registers and stack trace are available

Symbol search path is: SRV*e:\symbols*http://msdl.microsoft.com/download/symbols
Executable search path is: 
Windows 7 Kernel Version 7600 MP (4 procs) Free x64
Product: WinNt, suite: TerminalServer SingleUserTS Personal
Built by: 7600.16617.amd64fre.win7_gdr.100618-1621
Machine Name:
Kernel base = 0xfffff800`02a4f000 PsLoadedModuleList = 0xfffff800`02c8ce50
Debug session time: Tue Aug 17 13:06:38.421 2010 (UTC + 7:00)
System Uptime: 0 days 5:10:51.857
Loading Kernel Symbols
.

Press ctrl-c (cdb, kd, ntsd) or ctrl-break (windbg) to abort symbol loads that take too long.
Run !sym noisy before .reload to track down problems loading symbols.

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Loading User Symbols
Loading unloaded module list
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*                        Bugcheck Analysis                                    *
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Use !analyze -v to get detailed debugging information.

BugCheck 7F, {8, 80050031, 6f8, fffff80002a87ec0}

Probably caused by : ntkrnlmp.exe ( nt!KiDoubleFaultAbort+b2 )

Followup: MachineOwner
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Regard,

Tuan