WindowsXP keep restarting with Error 1003

Hi,

My Lenovo T60 laptop with Windowds XP Pro keep restarting (about 3-4
times/day) with Event Viewer show a System error ID 1003 (Event ID: 1003).
When using the machine, suddently, the blue screen come up with memory
dumping message and then reboot. This is really annoying. I have run al lof
the hardware test and everyuthing passed.

In the Event Viewer description, can find the following:

Error code 000000c2 or 000001a

and beside there is some other parameter.


Please kindly help in this case.

Thanks.