The Windows 7 Codec Pack supports almost every compression and file type used by modern video and audio files.
The package is easy to install, while also offering advanced settings to the high end user:
For simple installation select "Easy Installation".
For advanced installation options select "Expert Installation".

Special care has been taken to make the package:

Play a huge variety of Audio/Video files.

Free of conflicts.

Cause minimal impact on system performance (Disk space used, registry entries and stability).

Compatible in full with Microsoft Windows 7.

The package is easy to install, while also offering advanced settings to the high end user:

For simple installation select "Easy Installation".
For advanced installation options select "Expert Installation".

The package allows playback of almost every file type in existence, the only exceptions being commercial formats that require a special player.