This will resolve most of the USB Flash disk Problems like Incorrect Size / Bad Sector Marking / Unable to Format / Write Protect error
Step 1 :
Download the software : Software ChipGenius (2.64)
Note the VID and PID Numbers.
Step 2:
Go to this Website : http://www.flashboot.ru/index.php?name=iflash
And search for the matching VID & PID
Download the firmware and follow the instructions.
Step 3 :
Format the Flash Disk
******* Worked Fine for Me *******