Blue screen crash

Hi, I need help with my blue screen error, what`s causing it? It usualy happends when my lap top is idle longer than 10 mins.
I`ve added attachment with my dump log and perfmon report.
I also run RAM and hard drive tests, and there are no errors.

Remove Tune Up utilities, it may have damaged system files
Run SFC /SCANNOW Command - System File Checker

Remove Symantec/Norton software and use MSE
Symantec drivers are outdated

Code:

sptd.sys        0x8aa2f000    0x8ab22000    0x000f3000    0x4ad245ea    12/10/2009 00:54:02                
SYMEFA.SYS        0x8acb9000    0x8ad08000    0x0004f000    0x4a414e30    24/06/2009 01:50:40              
SYMEVENT.SYS        0x8b3c8000    0x8b3ed000    0x00025000    0x4a428942    25/06/2009 00:14:58         SYMFW.SYS        0x8b200000    0x8b214500    0x00014500    0x4a52951a    07/07/2009 04:21:46              
SymIMv.sys        0x90cf9000    0x90d02000    0x00009000    0x4a400e0b    23/06/2009 03:04:43               
SYMNDISV.SYS        0x8b3ed000    0x8b3fb000    0x0000e000    0x4a5295ef    07/07/2009 04:25:19           SYMTDI.SYS        0x8b394000    0x8b3c7600    0x00033600    0x4a529503    07/07/2009 04:21:23

Please remove any CD virtualization programs such as Daemon Tools and Alcohol 120%. They use a driver, found in your dmp, sptd.sys, that is notorious for causing BSODs. Use this SPTD uninstaller when you're done: DuplexSecure - Downloads
You can use MagicDisc as an alternative.

Code:

sptd.sys        0x8aa2f000    0x8ab22000    0x000f3000    0x4ad245ea    12/10/2009 00:54:02

Thank you for help, I just removed Norton 360 and my lap top now works fine without crashes. Thanx once again