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Windows 7: BSOD driver IRQL not less or equal (process name: system)

11 Nov 2011   #1

Windows 7 Ultimate x32 SP1 v.721 Build 7601
BSOD driver IRQL not less or equal (process name: system)

I have BSOD problem which occurs randomly. In the blue screen it’s written “Driver IRQL not less or equal”.
The important fact is that BSOD only appears when I use Win 7, and when I go back to Win XP the BSOD problem disappears. I have tested different versions of Win 7 on my laptop, but BSOD problem, have appeared with all of them.
I have checked my RAM with memtest 86+ and it did not show any problem.

I followed the instructions explained in "Reading and Troubleshooting the Windows Minidump (.dmp) File | I Found a Fix" to read the dump file and find the source of the problem. In the file obtained from minidump by following the instructions in that site, it is been written: "process name: system" and "DEFAULT_BUCKET_ID: VISTA_DRIVER_FAULT". I think this data plus the fact that BSOD does not appear in windows XP, shows that the problem is due to drivers. But I've installed the latest version of drivers. I don't know what else to do.
Any help would be appreciated.
(required files are attached)

- Windows 7 Ultimate x32 SP1 v.721 Build 7601
- Full retail
- Age of System(hardware): 3 years
- Age of OS installation: 3 month

- Acer/ Extensa 5620
- Core 2 Duo T5550 1.83 GHz
- Mobile Intel(R) 965 Express Chipset Family
- RAM: 2 GB

My System SpecsSystem Spec
11 Nov 2011   #2

Windows 7 Ultimate 64bit SP1


these old software\drivers

tifm21.sys        0x9384e000    0x9389a000    0x0004c000    0x4638510f    02-May-07 10:51:27 πμ                        
int15.sys        0x958a1000    0x958a8000    0x00007000    0x4689ae6c    03-Jul-07 4:03:24 πμ                        
SCDEmu.SYS        0x8dde9000    0x8ddf0840    0x00007840    0x4792f34e    20-Jan-08 9:07:58 πμ                        
VSTCNXT3.SYS        0x93b2d000    0x93be2000    0x000b5000    0x48f68ad9    16-Oct-08 2:29:13 πμ                        
DKbFltr.sys        0x938cf000    0x938d9000    0x0000a000    0x49caf214    26-Mar-09 5:10:12 πμ                        
netw5v32.sys        0x9340e000    0x93821000    0x00413000    0x49cba8fd    26-Mar-09 6:10:37 μμ                        
b57nd60x.sys        0x93215000    0x93251000    0x0003c000    0x49f44256    26-Apr-09 1:15:34 μμ
How to find and update drivers? Read here Best way to update drivers for free?


and post back.
My System SpecsSystem Spec

 BSOD driver IRQL not less or equal (process name: system)

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