Hey, i recently tried to follow the guide; http://www.howtogeek.com/howto.....-computer/

I have a Vista desktop computer from HP and have attemped to Dual Boot with XP as a secondary O/S as shown in the guide above. I got as far as installing XP onto the new partition (I made it 6GB in size) and it rebooting to continue the installation process... Now all it says is "Error loading operating system", all i can do is reboot the computer.

If i boot to the XP installation disk and it gets up to the screen that displays the different partitions it can install to, the partitions have changed, even though i haven't told them to, the sizes have changed and the names have changed. The partition i tried to install XP to has changed from E to I, but the size is the same, and XP has only taken up around half a GB so i presume it hasn't installed everything. I then deleted the XP partition and tried to boot again, though all it does is display a black screen with a blinking white underscore.

Is there anything i can do to fix this without formatting the whole hard disk? (I've tried installing XP again, same thing happens)

The main thing i'm worried about is having to format the whole hard disk as i really want to keep all the data.