Repair corrupted pendrive

Rixter, If it were me, I would use Recuva from Piriform. It is a free product that only wants to install Google Chrome as a browser that you can decline through the installation options. This product will try and allow you to salvage the data from your drive (TO ANOTHER DRIVE!). After salvaging the data you can then reconfigure (format) the drive. Recuva will allow you to select the drive even without a drive letter.