Tech Talk

open command prompt and type the following

C:\> convert c: /fs:ntfs - this will convert C: drive to NTFS

the following is the switches...
Converts FAT volumes to NTFS.

CONVERT volume /FS:NTFS [/V] [/CvtArea:filename] [/NoSecurity] [/X]

volume Specifies the drive letter (followed by a colon),
mount point, or volume name.
/FS:NTFS Specifies that the volume is to be converted to NTFS.
/V Specifies that Convert should be run in verbose mode.
/CvtArea:filename
Specifies a contiguous file in the root directory to be
the place holder for NTFS system files.
/NoSecurity Specifies the converted files and directories security
settings to be accessible by everyone.
/X Forces the volume to dismount first if necessary.
All opened handles to the volume would then be invalid.