Kernel_inpage_data_error?

I have a dell d505 laptop computer

- 1.4 Ghz M processor

- Windows XP

- 256 MB RAM

A few months ago the Blue-Screen-of-death BSOD kept appearing telling me that the computer has been halted coz of an error, and i ought to remoe any software or software i recently installed.

and the sub-error varies from win32k.sys atapi.sys. But always under the main error heading of "kernel_inpage_data_error".

I've changed my RAM to another slot, and my HDD is okay. I'e read through various forums, and they say the following:

1) either its a Boot-sector Viru -%26gt; Use antivirus / Do Level Format

2) HDD error -%26gt;Change HDD

3) RAm error -%26gt;replace RAM

4) heating problem - %26gt;Posible overheating

What is the real problem and what houdl i do ? Please advie .

Thank You.

P.s.

I've installed Mcafee anti-viru and the system eems to be stable, most of the time, i also use agnitum firewall pro.But if there is no AV installed. The system crashes after a few secs.

Kernel_inpage_data_error?network

instal windows ... reset bios...try another memory