Dump page memory

Hi,
Im using win xp sp2(1.4 ghz,845 chipset, 32 mb video card)
From few days im facing a problem of Blue screen of death.The blue screen shows dumoing physical memoty with an error msg "IRQ_not_less_EQUAL" please remove the software/hardware that you have installed recently.also it says disable any video bios cacheable option.
i have not installed any new software/hardware from months and i disabled the video bios casheable option.i just installed anti spyware recently which i removd.but the problem persists.but i dont think this is the cause of the problem coz i have insatalled the same on 3 other pcs which r rummning fine.
When this blue screen comes i have no option but to restart and when the system restarts it comes with an popup msg that windows has recoverd from a critical error.
Please Help.