plug it into linux. i once had my whole life on a flash drive, and one day panicked when i realised it wouldnt work any more..turns out there was a bit of silver chewing gum wrapper stuck in the end and it was bridging the connectors...anyway, does it show up in device manager?..if it does highlight it and right click. then select to update device driver. then itll probably ask to search the internet for driver..click on that. if all fails its probably come to the end of its life.
you get to device manager by right clicking computer from the start menu and selecting "manage" then "device manager".