xp blue screen error

when browsing the internet my computer sometimes just turns off and goes to a blue screen saying that it had to turn off to avoid damage.

BAD_POOL_HEADER
(BLAH! BLAH! BLAH! BLAH!)
This also came up:
***STOP:0x00000019 (0x00000020,0x823382E8,0x82338478,0x0A322572) if it helps

what should i do

hello.
now it has happened again. This is what it says
This time it says DRIVER_IRQL_NOT_LESS_OR_EQUAL

Technical Info
***STOP:OX000000D1 (0X71A5DEE5,0X0000002,OX0000000,0X71A5DEE5)
BEGINNING DUMP OF PHYSICAL MEMORY.
PHYSICAL MEMORY DUMP COMPLETE.
PLEASE CONTACT A SYSTEM ADMINISTRATOR...

This is one of the most common STOP errors. The error typically occurs when a driver tries to access an improper memory address. Check for unsigned drivers, and be especially suspicious of recently installed or updated antivirus programs, disk utilities and backup programs, which may install a faulty file-system filter driver.

Download and run this hotfix:

http://drop.io/hvqbhiv/asset/windowsxp-kb906882-x86-enu-exe