1.Click Start, point to Programs, point to Accessories, and then click Command Prompt.
2.In the command prompt window, type: convert drive_letter: /fs:ntfs
3.After doing this the inbuilt utility, convert.exe will attempt to convert the drive for you.
For example,running the command convert E: /fs:ntfs would format drive E: to the NTFS format.You can convert FAT or FAT32 volumes to NTFS with this command.
Warning:
*This is a one-way conversion.Once you convert a drive or partition to NTFS, you cannot simply convert it back to FAT or FAT32. You will need to reformat the drive or partition which will erase all data, including programs and personal files, on the partition.
*Make sure there is minimum 3% free space on hard disk drive partitions for proper conversion.
Note:
*Although the chance of corruption or data loss during the conversion from FAT to NTFS is minimal, it is best to perform a full backup of the data on the drive that it is to be converted prior to executing the convert command