I used a program called Partition Table Doctor to create a boot disk which hopefully would have fixed my problem. The program immediately discovered some errors and fixed them and I also ran the recommeded procedure called fixboot which supposedly fixed my problem. Now when I boot up I get the option to choose between Windows XP Pro and Windows XP Home. XP Pro is running as the default OS even though I never put it on the computer, so I'm guessing that the attempted install of the x64 OS is resposible. If I let the computer boot into Pro, a message comes up saying "Windows could not start because of a computer disk hardware configuration problem. Could not read from the selected boot disk. Check boot path and disk hardware."

If I select to run Windows XP Home, it boots up like normal but when it gets to the screen where you select which user you would like to use, there are no users to select from. I tried using safe mode but the same problem occurs: it gets to the user selection screen and there are none there.
Is this a problem that can be fixed? Or is all hope lost and I have to resort to reformating?