Bugs

The preferable vertical size of film window should be divisible by 16. Otherwise some problems may arise.
System Requirements
 MMX-enhanced CPU (Intel® Pentium MMX, Pentium II, Celeron, Pentium III, AMD® K6-2, K6-3, Athlon, etc.)
 Windows® 95/98/NT/2000/XP with DirectShow® installed (for Windows® NT 4.0 and Windows® 95 download DXMedia® Runtime here).
 32 MB RAM
 Any VGA card
 600 KB of free disk space for filter files
For free and noncommercial using, you can download the Moonlight WinDivX decoder here or here.