"Getting error like Windows was unable to complete the format l" - looks like a piece of cake, but some people had sleepless nights because of this error."
This error occurs when you format a magneto-optic disk with your windows operating system as FAT. Just remember that whether you have formated this disk earlier with any other operating system or any disk utility. If yes then reformat this disk with NTFS and then with FAT and if no then you disk needs a change.