Indeo 5 Decompressor

I have tried to play games on my new computer it keeps telling me I need a Vids:IV50 decompressor where can I get this? I have tried the indeo website but could only get Indeo 5 program all compressors there is no decompressors.

http://www.comp.lancs.ac.uk/computing/users/paul/forest/video%20codecs/iv5setup.exe
That should work.