Hp pavilion dv4,

Hello,
i am from iran.
I tried to downgrade my o/s from VISTA to XP on my notebook Pavilion DV4 1135ei, but when i'm trying to do the same i'm getting the below error, I had checked with HP total care they are not giving me a proper solution,
Also in BIOS option SATA native is not appearing. Can any one help me in this regards

"A PROBLEM HAS BEEN DETECTED AND WINDOWS HAS BEEN SUT DOWN TO PREVENT
DAMAGE TO YOUR COMPUTER
IF THIS IS THE FIRST TIME YOU'VE SEEN THIS ERROR SCREEN RESTART YOUR
COMPUTER. IF THIS SCREEN APPEARS AGAIN FOLLOW THESE STEPS:
CHECK FOR VIRUSES ON YOUR COMPUTER. REMOVE ANY NEWLY INSTALLED HARD
DRIVES OR HARD DRIVE CONTROLLERS. CHECK YOUR HARD DRIVE TO MAKES SURE IT
IS PROPERLY CONFIGURED AND TERMINATED.
RUN CHKDISK /F TO CHECK FOR HARDDRIVE CORRUPTION, AND THEN RESTART YOUR
COMPUTER.
***STOP: 0x0000007B (0xC0000034, 0x00000000, 0X00000000) "

Please help me.. thank u alot