Sorry about this, but can you explain the second theory?
I don't understand what you mean by
"First i want you to check the settings for the jumpers on the hard drive and the CD/DVD drive. Make sure you have them either set to master slave like they should be or set to cable select. Which is the best option"
Thanks for your help, as always
edit: I put in my brother's Windows XP Home disc, and when I start my pc it just goes to the screen with Verifying DMI Pool Data and NTLDR missing (or disk error has occurred). How can I get into the recovery console? Does it matter that I have windows xp professional on my pc, whereas the disc i'm using is windows xp home? (I don't have the pro disc).
edit2: i selected from my BIOS that it boots from my CD first..
It gets to this... ?
it says NTLDR is missing as soon as i press a key to boot from CD.