ntkrnlmp.exe not found "Error code 4270"

Hey, every time I startup my computer it always runs into the problem of not loading the ntkrnlmp.exe and then it gives me the error code number: 4270. - This computer is a desktop and is currently running Windows XP (not sure what edition or anything else) - I have a real genuine copy of XP, however, I'm having trouble finding the installation disc and I think it's been lost to the ages as this computer is about 3-4 years old - It does have a floppy drive but I never use it - I have no idea about the backup information about it since I do not use this computer anymore - The BIOS is all in default. I tried tinkering with it earlier but nothing seemed to work so I set it back to default. - And the machine is not under warranty anymore As a side note, I downloaded a reinstallation of Windows XP file for the USB stick but when I set the BIOS to boot from the USB stick it still does not work. This installation file is supposed to include everything needed for Windows XP and it has a copy of ntkrnlmp.exe. The whole file itself is about 141 MB; I'm not sure if that sounds right to be the whole Windows XP installation but I could be wrong. So could somebody please help me fix this problem? Sorry if I have terrible grammar : \

Read here, see if this helps: http://support.microsoft.com/?kbid=314477

also if you don't find your winxp disk you could downloald floppy boot disk disk set from Microsoft ,to boot computer and do some of the stuff in the link in the above post .
http://support.microsoft.com/?kbid=310994

Alright, thanks a bunch. This is good information but it might take me a few days to get my hands on a floppy disk so I'll keep you posted when I do. And as for that USB thing I downloaded, is it pretty much useless?

Alright, thanks a bunch. This is good information but it might take me a few days to get my hands on a floppy disk so I'll keep you posted when I do. And as for that USB thing I downloaded, is it pretty much useless?

good luck ,you'll need 6 disk though i think