The K-Lite Codec Pack has a couple of major advantages compared to other codec packs:

• It is updated frequently. So it is always up-to-date with the newest and/or best components.
• All components have been carefully selected for specific purposes. It is not just a random bunch of stuff thrown together.
• It is very user-friendly and easy to use.
• Works great with Windows Media Player and Windows Media Center. But also with all other DirectShow players, such as Media Player Classic, BS.Player, ZoomPlayer, and others.
• The installation is fully customizable, meaning that you are able to install just those components that you really want.
• The pack has many options, which allows you to tweak it to your own specific needs and preferences.
• Uninstallation removes everything that was installed by the pack. Including all registry keys. All changes are properly undone.
• It is extremely easy to make a fully customized unattended installation with the integrated wizard.
• It does not contain any codecs or filters that are known to be bad, buggy or unstable. In fact, the installer is able to detect and disable several known troublemakers.
• It tries to avoid potential conflicts with other codecs installed on your computer. The installer is able to detect and remove over 100 different codec and filter packs.
• The installer is able to detect broken codecs and filters on your system, and helps you to remove them.
• It is a very complete package, containing everything you need to play your movies.
• The pack has options to activate thumbnail generation in Windows Explorer for several popular video file formats, which are by default not thumbnailed in Explorer.
• The pack automatically configures Media Center to recognize all common audio and video file formats, so that such files show up in your media library.
• This pack has a huge user base. This means that problems are found and resolved quickly.
• There are different variants of the pack. From very small to large.
• The pack is suitable for both novice and expert users.

Mega version:

* Contains several ACM and VFW codecs for audio and video encoding.

* Supports several additional lossless audio formats.

* Contains additional DirectShow filters. Giving you more freedom of choice to use your preferred filters.

* Contains a few useful tools, like GraphStudio.

* Includes Real Alternative.

* Includes a few extra ACM and VFW codecs.