Driver_IRQL_Not_Less_Or_Equal- system crash-can't restart

a little more about the system would be a help. But some assumptions can be made:
1. Your child pressed the power switch multiple times because the system wouldn't start right up. This is where knowing what hardware you have (i.e. power supply) would help. Could be the constant on/off action confused the p/s so much it decided to burn itself up and not work any more (not likely)

2. You didn't pull the power plug from the wall and re-in sert it.

3. You didn't make sure the p/s was on AT the p/s. Here again it would help if we knew what you had.

4. Your system would turn on but not bring up windows. More symptoms would help here.

5 Your system wouldn't even turn on the fans. I refer you to Items 1 and 4.

I can't think of anything else. Maybe one of my comrades here will.

and life goes on...


Jack

normally indicates a corrupt driver.

You were more than a little vague in wording your message but I assume that the computer begins to boot then bluescreens with the error message.

Here is a link to Microsoft KB articles referencing the error. It is specific to NT based systems so some references are for Win XP and others for Win 2K or server but most apply (or might apply) to XP regardless of OS Mentioned.

Knowing the ENTIRE stop message is helpful as the numbers are meaningful. The format is normally something like:
STOP 0x000000D1 (parameter1, parameter2, parameter3, parameter4) DRIVER_IRQL_NOT_LESS_OR_EQUAL (possibly a sys file name here)
http://search.microsoft.com/search/results.aspx?view=en-us&st=b&na=82&qu=Driver_IRQL_Not_Less_Or_Equal