Old ASUS board socket 478 modeled P4XP-X. I have reformatted it 5 times already. I have tried full updated it from microsoft site with all the hot fixes but still the problem occurred. Tried also not updating the OS from microsoft site but still got no luck. I have changed the memory from PC400 to PC2700 but still it didnt helped. Fitted also a new 80-pin IDE cable but still didnt worked out. Its the blue screen of death with the message "IRQL_NOT_LESS_OR_EQUAL". Anyone encountered and solved this problem? Tabang mga pre.