AndreP,
My suggestion is to backup your data, and perform a clean install, or
buy a 3rd Party software package such as Partition Magic to convert from
FAT/FAT32 to NTFS. The reason, is you can specify the cluster size. The
native Win2k/XP convert command creates NTFS with 512k clusters, native NTFS
formatting from a clean install uses 4096k clusters, or using PM you can
specify 4096k clusters, which are more efficient for I/O processing. This
can be very significant on I/O intensive applications, especially running on
laptops or low-end desktops, significantly impacting performance.