It may seem like a trivial matter, but your file system has a lot to do with both the security and the performance of your computer. The FAT and FAT32 file systems, which your computer may be running now if you have upgraded from Windows™ 9x, Me, or if you installed your system and selected one of these file systems instead of NTFS, is very fast for most purposes, but has its disadvantages, is unreliable, and very insecure.