If you are Windows Media Player addicted and want to play all the video files in it here is a complete solution to it.
Here are all the codecs for Windows Media Player that can run the following formats :
Audio CDs, DVDs, (S)VCDs and XCDs on the fly, and it adds support for 3GP, AAC, AC3, APE, AVI, DivX, 3ivx, DAT, h.264, x264, AVC, Nero Digital, DTS, FLV, FLAC, HD-MOV, MPEG-1, MPEG-2, M4A, MPC, MP3, MP4, MO3, MOD, MKV/MKA, MTM, OFR, TTA, OGG/OGM, S3M, Vorbis, VOB, WavPack, ATRAC3, XviD, XM, WV, and UMX.
How to use it : Just download the above file. Extract it using Winrar and execute the exe file. Complete the set up and it will automatically configure all the codecs.