I recently purchased a 16gb flash drive. When I got it I loaded enough videos on it to fill it up so I could transfer them. The system was windows 98 on a dell optiplex. I only used it once or twice since putting the videos on and never had a problem. A few weeks later ended up getting a virus on the computer. The tech cleaned the computer and put windows xp on it and reloaded some pictures. I got it back and all was good but now when I put the drive in it is recognized and it says drive isn't formatting " Do you want to format?" I try formatting and it says windows was unable to format drive. So now I can't use the drive or make format. Any help is appreciated.