error BSOD: IRQL_NOT_LESS_THAN_OR_EQUAL

Hi,

For a month now i have been suffering this predicament..
lol.. Im running WinXP pro on my Toshiba laptop,sometimes
for no apparent reason. the system starts a mem.dump and
then restarts. Reboots are sometimes successful other
times it takes upto 8 reboots to get the thing to load.
The error i get on the BSOD is
IRQL_NOT_LESS_THAN_OR_EQUAL not much info on the cause, or
that maybe cos i dont understand the (0xA...) crap. I've
been told my pagefile may be corrupt, tried changing that
w/o any help.. tried uninstalling any and all programs i'd
installed around the time the errors started...im losing
it now.

The latest i've read on the Knowledge base is that the
error is caused by the 'driver verification service' when
it detects unauth. access to the memory by a driver...

My Question is....

DOES ANYONE KNOW WHERE I CAN FIND THE 'DRIVER VERIFICATION
SERVICE' UTILITY... if one exists... or ANYTHING THAT WILL
HELP.

....sorry abt the caps... im losing sleep over this thing..

Laters!