Drama queening isn't helpful. Yes, the hard drive needs to be replaced (or at least low level formatted which would require your data to be backed up to another drive anyway - but that might not fix it).
If there's nothing that important or you can back it up to DVD or flash drive, you'll need a recovery disk. Replace with a new laptop hard drive and reinstall Windows.
Like USA says, copy off your date... Desktop, documents, pictures, leave the music unless it is your life, same for the Videos, if you have any squirrelly places, get them too.. Now you have "your stuff.
Someone around you will know how to and have the external drive adapter to clone your HDD to another one.
Do you have a Google account or a Microsoft account? They offer around 5GB of FREE "Cloud Storage" as well to keep the "now needed" documents. With Google, you also get their built in Document editor tools to keep moving (my daughter needed to do this in the winter quarter she crushed the screen on her laptop..)