Devs blame Windows for VLC media player bug that causes 33-second delay when playing MP3 files — creators allege Microsoft Defender blocking plugin cache is to blame
August 15, 2026
VLC, the widely embraced open-source media player, is currently facing an unexpected challenge on Windows 11. Users have reported delays of up to 33 seconds when attempting to play a straightforward MP3 file. This peculiar situation has arisen following an unexplained modification to the Windows operating system.
The issue gained traction when game developer Jonathan Blow publicly shared his frustrations, revealing that he had opted to switch from VLC to Microsoft’s Media Player due to the significant lag. His comments also served as a critique of the performance of open-source software on Windows platforms.
Developer Response
In response to Blow’s observations, the VLC development team promptly defended their software, asserting that the delays were not a result of any faults within VLC itself. They attributed the problem primarily to a bug associated with Microsoft Defender, which was introduced in a recent Windows 11 update. This bug has reportedly led to a conflict with VLC’s plugin cache, causing the sluggish performance.
According to the VLC team, a simple solution exists: reinstalling VLC or regenerating the plugin cache can resolve the issue. They emphasized that labeling open-source software as “embarrassing” in this context overlooks the complexities introduced by external factors, such as operating system updates.
This is because of a « bug » from Microsoft Defender in one update of Windows 11, who magically made VLC plugins cache quarantined by Windows. Reinstalling VLC or regeneration of the plugin cache will fix this. Calling open source software embarrassing when it is a Windows…
As the situation unfolds, it highlights the intricate relationship between software developers and operating system providers, reminding users of the potential challenges that can arise from updates and compatibility issues.
Devs blame Windows for VLC media player bug that causes 33-second delay when playing MP3 files — creators allege Microsoft Defender blocking plugin cache is to blame
VLC, the widely embraced open-source media player, is currently facing an unexpected challenge on Windows 11. Users have reported delays of up to 33 seconds when attempting to play a straightforward MP3 file. This peculiar situation has arisen following an unexplained modification to the Windows operating system.
The issue gained traction when game developer Jonathan Blow publicly shared his frustrations, revealing that he had opted to switch from VLC to Microsoft’s Media Player due to the significant lag. His comments also served as a critique of the performance of open-source software on Windows platforms.
Developer Response
In response to Blow’s observations, the VLC development team promptly defended their software, asserting that the delays were not a result of any faults within VLC itself. They attributed the problem primarily to a bug associated with Microsoft Defender, which was introduced in a recent Windows 11 update. This bug has reportedly led to a conflict with VLC’s plugin cache, causing the sluggish performance.
According to the VLC team, a simple solution exists: reinstalling VLC or regenerating the plugin cache can resolve the issue. They emphasized that labeling open-source software as “embarrassing” in this context overlooks the complexities introduced by external factors, such as operating system updates.
As the situation unfolds, it highlights the intricate relationship between software developers and operating system providers, reminding users of the potential challenges that can arise from updates and compatibility issues.