Blue screen, crashing laptop

this happens often when waking up from sleep mode, or screen saver, and during racing games, grid and dirt to be specific.
this is the event viewer report:

The computer has rebooted from a bugcheck. The bugcheck was: 0x1000008e (0xc0000005, 0xbf038ecc, 0x8b0d9c34, 0x00000000).

i have hp elitebook 6930p, 2g ram, ati 3450 hd graphic card operating on xp sp2, here is the last files dump files.

my laptop is brand new and i've sent to hp support and they claim the hardware is healthy.
can anyone help with this, i installed the latest drivers but nothing improved.