This only applies to FAT partitions. You must log in as an administrator for this to work.
Click Start - Run - type "cmd" (without quotes). Then click OK.
Type the following into the Command Prompt window:
convert drive: /fs:ntfsReplace drive: with the drive letter of your Windows partition.
convert C: /fs:ntfsWindows will then check your hard disk for errors, then attempt to convert your hard disk to NTFS.
After the program finishes, reboot your computer.