Although reformatting is an option, I don't think it's going to be necessary in this case. I can likely save you the frustration of having to restore everything after having reformatted and re-installed… ESPECIALLY if you don't have a secondary hard drive (or at least partition) in which to store your content on, separate from the hard drive/partition that you keep your data on.
If you need further assistance, you have my number. If you don't know where you've put it, PM me and I can send it to you again, or I can call you... I still have your number saved in my phone 🙂