AnyMP4 Blu-ray Player doesn't want to work properly? Bring it to life.

AnyMP4 Blu-ray Player is a popular choice for watching high-definition physical discs and digital media on Windows, but like any sophisticated software, it can occasionally run into playback hiccups. Issues usually stem from outdated graphics drivers, restrictive system permissions, or simple licensing conflicts rather than hardware failure. This guide covers the most frequent errors users encounter in late 2024 and 2025 and provides tested solutions to get your movie night back on track.

Common Errors

• Error 4104: A specific registration error indicating the license code is already active on another device.
• Unable to Play Video Error 5: A generic playback failure message often caused by file corruption or unsupported codecs.
• Black Screen with Audio: The video fails to render while sound continues, usually due to GPU driver conflicts or HDCP issues.
• Failed to Load Disc: The player refuses to read the physical media, often linked to region code mismatches or drive permissions.
• Audio Out of Sync: Dialogue lags behind video (lip-sync issues) during high-bitrate playback.

Fix 1: Registration Error 4104

This specific error code appears when the AnyMP4 license server detects that your registration key is already in use on another computer. Standard licenses are typically valid for only one PC.

1. Check if you have the software installed on an old or secondary computer.
2. Uninstall the software from the previous device to free up the license.
3. If you cannot access the old computer (e.g., it crashed or was sold), you must contact AnyMP4 support directly via email.
4. Request a "license reset" in your email subject line and include your order number.
5. Once support confirms the reset (usually within 24 hours), attempt to register again on your current PC.

Fix 2: Unable to Play Video Error 5

"Error 5" is a catch-all message that often appears when the player cannot decode the specific file format or if the digital file itself is slightly corrupted.

1. Verify the file integrity by trying to play a different video file of the same format (e.g., another MKV or MP4).
2. If the file is valid, go to the player's Preferences menu.
3. Navigate to the Video tab and look for "Hardware Acceleration" or "GPU Acceleration."
4. Uncheck this option to force the software to use your CPU for decoding, which is often more stable for obscure formats.
5. Restart the application and try loading the video again.

Fix 3: Black Screen with Audio

When you hear the movie but see only a black screen, your graphics card is likely struggling to render the overlay, or there is a conflict with Windows HDCP (content protection) settings.

1. Close AnyMP4 Blu-ray Player completely.
2. Right-click the Start button and select Device Manager.
3. Expand Display adapters, right-click your graphics card (NVIDIA, AMD, or Intel), and select Update driver.
4. Choose "Search automatically for drivers" and let Windows install any pending updates.
5. If the issue persists, right-click the AnyMP4 shortcut on your desktop and select Run as administrator to ensure it has full access to video rendering resources.

Fix 4: Failed to Load Disc

If the player spins the disc but eventually fails to load it, the issue is often a Region Code mismatch or a lack of drive access permissions in Windows.

1. Ensure your optical drive works by opening File Explorer and checking if the disc appears as a drive letter (e.g., D: or E:).
2. Launch AnyMP4 Blu-ray Player and click Menu > Controls > Region Code (if accessible before playback).
3. Match the region code to your disc: Select Region A for Americas/Southeast Asia, Region B for Europe/Africa/Australia, or Region C for Asia/Eastern Europe.
4. If using an external Blu-ray drive, try connecting it to a USB 3.0 port directly on the motherboard (rear of the PC) rather than a front hub for better power delivery.

Fix 5: Audio Out of Sync

High-resolution 4K Blu-rays can sometimes cause audio latency, resulting in distracting lip-sync errors.

1. While the video is playing, click the Audio menu in the top bar.
2. Select Audio Track to ensure the correct stream is selected (e.g., switch from 7.1 surround to 5.1 or Stereo if you only have standard speakers).
3. If sync is still off, use the keyboard shortcuts (often Shift + K or Shift + J) to adjust audio delay in +/- 50ms increments.
4. Alternatively, go to Preferences > Audio and look for an "Audio Delay" slider to manually correct the timing offset.

Prevention Tips

• Clean Your Discs: Fingerprints and dust are the #1 cause of "loading" errors; wipe discs gently with a microfiber cloth from the center outward before playing.
• Keep Drivers Fresh: Check for GPU driver updates monthly, as new drivers often contain fixes for video decoding bugs.
• Close Background Apps: Heavy applications (like video editors or games) can hog the video memory needed for smooth Blu-ray playback.
• Stick to One Region: Try to purchase discs that match your primary region to avoid constantly switching settings, which some drives have a firmware limit on (often 5 changes max).

When to Contact Support

If you encounter Error 4104 repeatedly even after a reset, or if the player crashes instantly upon opening despite a fresh installation, you need professional assistance. Before contacting AnyMP4 support, locate your Order Number and take a screenshot of the exact error message or code. Email their support team with these details and your Windows version (e.g., Windows 11 24H2) to speed up the troubleshooting process.