First, check your system and make sure you have
all the necessary software to view our Windows Media 9 files:

Operating Systems:
PC users require Windows 98 SE, Windows Me, Windows 2000 or Windows XP OS

Browsers:
Internet Explorer 5.01 or Netscape Navigator 4.7
Note: Netscape requires Windows Media Plug-In for Netscape

Video Player:
Windows Media Player 9.0
See all Microsoft WM9 system requirements

Then, make sure you have all critical Microsoft updates and patches for your operating system installed. You can use Microsoft’s Windows Update system to make sure your O/S is completely up to date.