Ecran bleu sous windows 7, pilote ?

Bonjour,

Mon pc plante régulièrement sous windows 7 avec un ecran bleu, voici ce qui est marqué :

A problem has beeb detected and windows has been shut down to prevent damage to your computer.
DRIVER_IRQL_NOT_LESS_OR_EQUAL

If this is the first time you've seen this stop error screen,
restart your computer. If this screen appears follow
these steps:

Check to make sure any new hardware or software is properly installed.
If this is a new installation, ask your hardware or software manufacturer
for any windows updates you might need.

If problems continue, disable or remove any newly installed hardware
or software. Disable BIOS memory options such as caching or shadowing.
If you need to use safe mode to select advanced startup options, and then
select safe mode.

Technical information :

*** STOP: 0x000000D1 (0xE180000C, 0x00000002, 0x00000001, 0x8F7C477F)

*** netr70.sys - adress 8F7C477F base at 8F79D000, datestamp 45923fd3

collecting data for crash dump...
initializing disk for crash dump...
beginning dump or physical memory.
dumping physical memory to disk: 100


Voila pour l'écran bleu

Si quelqu'un peut me venir en aide , merci