Do you have any USB devices hooked up? I suggest you run the computer with just the keyboard, mouse, and monitor and check for problems then. If the problem doesn't occur with only these devices plugged in then you know its some other piece of hardware (possibly a printer or other USB device)

 

I also recommend you run a PSA diagnostic by pressing F12 on boot-up and selecting utility partition. This can rule out a potential hardware conflict.

Take a look. http://support.microsoft.com/kb/293077

 

Inspiron 1501

MK36 AMD Turion

2 GB RAM

ATI 200MSeries

I too get this same error as described.  I have not had the system crash while I am actually using it, just at some random point while sitting idle.  The full error mesage I get is...

 

DRIVER_IRQL_NOT_LESS_OR_EQUAL

 

STOP: 0xD1 (0x0, 0x2, 0x8, 0x0)

 

My machine is very new and I have only installed Itunes/Quicktime at this point.  I only have a keyboard and mouse connected to USB with Ethernet to my wireless router.  An item of interest beyond a standard config, is that I ordered an IEEE 1394 interface.