If the internal decoder fails, the most stable way to get Xvid working on Windows 10 in 2021 is to install a codec pack that integrates with your system. The is the industry standard. Once installed, MX Player (and other players) will automatically detect the Xvid codec.

Do not simply download random "Codec Packs" from the internet—that is a fast track to adware. Instead, follow this official method using MX Player's custom codec feature.

Technically, you can force MX Player to use external codecs, but Microsoft has locked down the Windows 10 version. Here is the only method that worked for some users in 2021:

2021 (Retrospective) Subject: Codec support, playback performance, and installation requirements

To define the optimal configuration for playing Xvid content on MX Player for Windows 10, addressing the confusion between the necessity of system-wide codecs versus internal player decoders.

If you want to ensure your Windows 10 system can handle Xvid files across any player (including Windows Media Player or MX Player), you should install the standalone codec. Xvid Video Codec Latest 2026 Download