Hi, Welcome to the forum.
I'm not sure that could be wrong without explanation really as to the full problem.
I'm sure the best thing you could do is Slave it to another computer. It's simple, and you could get all the data off before wiping the drive and re-installing Windows. It's then as simple as putting all the data back.
Other than that, I'm afraid I don't have any answers. Have you tried booting it with Last Known Good Configurations? Instead of safe mode whent the computer boots? Though if you don't have Windows XP on the machine, this option would not be available. It doesn't wipe anything, and just runs the backup boot.ini that it stores.
As for you being a new computer user to this type of stuff. You do seem to know more than a total beginner
Hope this helps