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MP4 files are one of the most popular video formats used around the world. However, sometimes you might face issues playing MP4 videos on Windows 10. This can be frustrating, especially if you need to watch an important video.

Fortunately, most MP4 playback errors can be fixed with a few simple steps. You do not need to be a tech expert to solve this problem. Just follow the instructions carefully.

This guide will help you understand why MP4 videos might not play on your PC and how to fix the issue quickly. Let’s get started with some quick notes before diving into the solutions.

By the end of this article, you will know several easy ways to fix MP4 playback errors on Windows 10.

Quick Note: What to Check Before You Start

• Check the Video File: Make sure the MP4 file is not corrupted. Try playing it on another device or media player.
• Update Windows: Keep your Windows 10 system up to date as updates often fix bugs related to media playback.
• Check Storage Space: Ensure your computer has enough free space, as low disk space can cause playback problems.
• Close Other Programs: Sometimes, other running applications can interfere with video playback.

Step 1: Use the Built-in Windows Media Player or Movies & TV App

Windows 10 comes with two default video players: Windows Media Player and the Movies & TV app. The first step is to try opening your MP4 video with these apps.

1. Right-click the MP4 file.
2. Choose Open with.
3. Select Movies & TV or Windows Media Player.

If the video plays, the problem might be with your usual media player. You can continue using the default apps or try the next steps to fix other players.

Step 2: Update Your Video Drivers

Video drivers help your computer display videos correctly. Outdated or missing drivers can cause playback errors.

1. Press Windows + X and select Device Manager.
2. Expand the Display adapters section.
3. Right-click your graphics card and select Update driver.
4. Choose Search automatically for updated driver software.
5. Follow the on-screen instructions to install any updates.

Restart your PC and try playing the MP4 file again.

Step 3: Install Missing Codecs

Codecs are small programs that decode video files so your media player can play them. If the needed codec is missing, the video won’t play.

One popular codec pack is the K-Lite Codec Pack. It’s free and supports almost all video formats.

1. Go to the official K-Lite Codec Pack website.
2. Download the Basic or Standard version.
3. Run the installer and follow the steps.
4. Restart your computer after installation.

Try playing the MP4 file again. Most codec-related issues will be resolved with this pack.

Step 4: Use a Different Media Player

If your default player still cannot play the MP4 file, try using a more versatile media player.

• VLC Media Player: Free, lightweight, and supports almost all video formats without needing extra codecs.
• MPC-HC (Media Player Classic – Home Cinema): Another free player with wide format support.

Download and install one of these players and open your MP4 video with it.

Step 5: Convert the MP4 File

If the video still does not play, the MP4 file itself might have an unusual encoding. You can convert it to a different format or even a standard MP4 format using online converters or free software like HandBrake.

1. Download and install HandBrake from its official site.
2. Open HandBrake and load your MP4 file.
3. Select a preset like Fast 1080p30.
4. Choose the output folder and click Start Encode.
5. Try playing the converted file after the process finishes.

Advanced Option: Run Windows Troubleshooter for Video Playback

Windows 10 has a built-in troubleshooter that can automatically find and fix some video playback problems.

1. Go to Settings > Update & Security > Troubleshoot.
2. Click on Additional troubleshooters.
3. Select Video Playback and then click Run the troubleshooter.
4. Follow the on-screen instructions.

Frequently Asked Questions (FAQs)

Why won’t my MP4 video play on Windows 10?

This usually happens due to missing codecs, outdated video drivers, or corrupted files. Sometimes the media player might not support the video encoding.

Can Windows Media Player play all MP4 files?

No, Windows Media Player supports many but not all MP4 videos. Some MP4 files use codecs that Windows Media Player can’t decode without additional codec packs.

Is VLC Media Player better for playing MP4 files?

Yes, VLC supports almost every video format and codec without extra installations. It’s a great alternative if Windows default players fail.

How do I know if my MP4 file is corrupted?

If the file doesn’t play on any media player or shows errors, it might be corrupted. Try downloading or copying the file again.

Can converting the MP4 file fix playback errors?

Yes, converting the file can help if the original encoding is incompatible with your media player.

When Nothing Works

If you have tried all the steps above and still cannot play your MP4 videos, consider these final options:

• Check for Windows Updates: Sometimes, Microsoft releases fixes in system updates.
• Scan for Malware: Malware can cause playback issues. Use a trusted antivirus to scan your PC.
• Use Online Video Players: Upload your video to trusted online players like YouTube (set as private if needed) to check if it plays there.
• Contact Microsoft Support: For persistent system-related issues, visit the official Microsoft support page.

Conclusion

MP4 playback errors on Windows 10 can be caused by several factors, but most are easy to fix. Start by trying the default players and updating your drivers. Installing codec packs or switching to a player like VLC often solves compatibility issues.

If needed, converting the video file or running the Windows troubleshooter provides additional help. Always check the file’s integrity and keep your system updated.

By following these simple steps, you can enjoy your MP4 videos without interruption. Remember, patience and following instructions carefully will get your videos playing smoothly again.