BSOD after start up and no restore points

[DaveMac5935]

Having trouble finding why my computer is going blue screen. sometimes it will let you start a program other times it will go in just a few minutes. below is the window error screen and there's a file attached.
Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.768.3
Locale ID: 1033
Additional information about the problem:
BCCode: a
BCP1: 0000000000000000
BCP2: 0000000000000002
BCP3: 0000000000000001
BCP4: FFFFF8000F4DCC3F
OS Version: 6_1_7601
Service Pack: 1_0
Product: 768_1

 

[ICIT2LOL]

Hello and welcome Dave mate can you boot into safe mode and run these first up

http://www.sevenforums.com/tutorials/1538-sfc-scannow-command-system-file-checker.html

http://www.sevenforums.com/tutorials/433-disk-check.html < use the /f and /r options in Option2 if necessary

 

[Golden]

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*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
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Use !analyze -v to get detailed debugging information.

BugCheck A, {0, 2, 1, fffff8000f4dcc3f}

*** WARNING: Unable to verify timestamp for [COLOR="Red"][B]SYMNETS.SYS[/B][/COLOR]
*** ERROR: Module load completed but symbols could not be loaded for SYMNETS.SYS
Probably caused by : NETIO.SYS ( NETIO!WfpExpireEntryLru+17 )

Followup: MachineOwner
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It would appear Symantec/Norton is the cause of the problems. Replace it with MSE, and monitor for further BSOD's.

Driver Reference Table - SYMNETS.SYS