FAT16, FAT32, and NTFS.
Windows 98 supports FAT filesystems only. Windows XP supports FAT and NTFS filesystems.
There are like hundreds of them, I cannot list each on of them now.
Under Windows I believe the only file system with full support for this is NTFS. On the Mac its standard HFS+ file system has always supported this. On Unix and Linux all native file systems supported this.
Windows XP natively supports FAT12, FAT16, FAT32, and NTFS. Other file systems, such as HPFS, JFS, ext2/3, and ReiserFS can be supported through an IFS (Installable File System).
NTFS is the predominant file system although FAT is supported on XP.
XP and 7 supports file sharing through network or any Windows supported storage device.
The file systems supported by Windows XP and Windows Vista are essentially the same. However, Windows Vista does not support booting from FAT32 partitions, and Windows XP does not support Windows Vista's Shadow Copy feature (which makes automatic backups of files) and will delete the backups if it accesses an NTFS Windows Vista partition.
Windows 98 supports both the FAT16 and FAT32 file systems. The FAT32 file system will support drives up to 2 terabytes in size, while the FAT16 file system will support drives up to 2 gigabytes in size.
Emule deals with file transfers. You can download emule on toggle. This is supported by Windows XP; 7 and 2000. Also supported by Windows Vista and Windows ME.
Most likely because that file type is not supported in Windows Movie Maker