This includes a few settings related to multimedia playback, such as thumbnails, file associations, and certain codec tweaks.For an optimal user experience we recommend that you re-install the (latest version of the) codec pack after updating Windows.
Unfortunately, there are a lot of professional programs that need Quick Time.
For example Adobe After Effects, Go Pro Studio, and Sony Vegas.
Go to the Windows Media download page (see Resources).
Select "Windows Media Player" in the Select Download box.
Select the latest version of Windows Media Player for your operating system in the Select Version box. When prompted, click "Save" and download the Windows Media Player updating file to your desktop.
For example, select Windows Media Player 11 for Windows XP if you are currently using Windows Media Player 10. Double-click the Windows Media Player updating file and click "Run" to launch the installation wizard.
This package can be used as an alternative to automatically downloading Windows Media Codecs, or to correct problems experienced with previously-downloaded codecs.
Install the MKV codec in Windows Media Player by downloading the codec pack and running the installer.
It even has DXVA2 hardware acceleration in combination with modern graphics cards such as the AMD Fury/Nano, AMD RX 470/480, NVIDIA GTX 950/960, NVIDIA GTX 1060/1070/1080, and Intel Kaby Lake GPUs."This pack is great.