Here what to do go right click on my Computer then press manage, You will see computer managememt pop up. Then on the left hand side of this page double Click on (Disk Mamagement) On this page you will see all your Drive at the bottom eg: (F) or (D) or (C). Right Click on the drive that has your flash drive and press format. A next document pop up. On this Document select FAT32 on (File System) Then select default on (Allocation unit size) Then Click (Perform a quick format) On (volume label) you can even Put a name for your USB flash If you wish. Now press Stat and once again you can open your USB Drive. Let me know if it work.