These instruction will assist you in converting the C: partition from FAT32 to NTFS. If you wish to convert another partition instead, just use that drive letter instead of C: while following these instructions.
1.    First, back up your data. The conversion process almost always works flawlessly, but there is no point in taking the risk.
2.    Click the <Start> button.
3.    Click <Run>.
4.    Enter “cmd” into the text field labeled “Open”.
5.    Click the <OK> button.
6.    Enter the command “vol c:” to find the volume label for the C: partition.
7.    Enter the command “convert c: /fs:ntfs” to convert the C: partition from FAT32 to NTFS.
8.    When prompted, enter the volume label for the partition.