MFT stands for Master File Table. Typically in Windows XP , if you are using NTFS ( I would recommend it if you don't) then by default,NTFS would reserve 12.5% of your free diskspace for MFT. MFT fragmentation could also cause a significant slow down. Let me discuss size first. Now if you have installed tons of different programs on your hard disk (or intend to do so), MFT utilization is going to be high. Under such situation, it may be beneficial to increase this percentage to say 25%. If you want to do this, here is the the trick. Open Registry by going to START-RUN and entering REGEDIT and Navigate to HKEY_LOCAL_MACHINE\\System\\ CurrentControlSet\\Control\\FileSystem. In right pane, Add one more key by the name "NtfsMftZoneReservation" with the
REG_DWORD value of 2. DWORD value of 1 is interpreted as 12.5% ,2 as 25% and so on.
