You don't need this exploit. You could use a media player that doesn't need MS codec packs, but assuming this is not an option:

1. Go to https://store.rg-adguard.net.

2. Paste in https://apps.microsoft.com/detail/9n4wgh0z6vhq.

3. Change ring to "Retail".

4. Download the file with an "appxbundle" extension.

5. Install it (might need to enable developer mode for this step; don't remember).