Bluescreen Help Please!

[blighter]

Hey all,

My sisters laptop keeps bluescreening and am not sure why
It has 'slow moments' where everything grinds to a halt and then slowy picks itself up again. I have tried reinstalling XP twice and that never helped. All help would be appreciated! More detailed bluescreen below

Matt

KERNAL_DATA_INPAGE_ERROR

Technical Information:
*** STOP 0x0000007A (0xc03E4734, 0xc000000E, 0xF91CD642, 0x0A750860)

***     ftdisk.sys - Address F91CD642 base at F91C3000, DateStamp 3b7d8419

 

[blighter]

ok, to access the fan you need to take the whole case apart (stupid design ) so i have swapped the hard drive with a spare i have found. I also did a memory test and it turned out ok. thanks for your help, lets hope this works!