You did make a recovery disk for your Windows installation, right? Just pop that in and do a disk check and/or select the repair option so that it can fix your MBR. If that doesn't work, stick in a live Linux Mint disk, open GParted, right-click on the windows partition and select "check". It will check and try to repair the file system. If those don't work I think you're hosed. You will need to reinstall Windows and/or delete Windows and just install Linux Mint.
HP Pavilion 17 Notebook, 8GB DDR3, 2.5GHZ A10-APU, Radeon HD 8650G
Registered Linux User #520972