Microsoft Defender’s Impact on VLC Media Player Performance
Recent investigations have highlighted a troubling trend among users of VLC Media Player, particularly those running Microsoft Defender as their antivirus solution. It appears that a specific update to Microsoft Defender has inadvertently led to performance issues, notably a significant slowdown in the startup of VLC. This situation has not been reported with other antivirus software, raising questions about the compatibility of Microsoft Defender with certain applications.
Jean-Baptiste Kempf, a leading figure among VideoLAN developers, has publicly attributed the sluggishness to a bug in a recent Microsoft Defender update. In a post on X/Twitter, he noted that the update caused the VLC Player’s plug-in cache to be quarantined, which in turn hampers the program’s ability to launch efficiently. The problematic Defender signature update, identified as version 1.455.50.0, along with Windows Update KB5121003, released on August 11th, has been linked to these ongoing issues.
To remedy the situation and restore VLC Media Player to its usual swift startup time, users can take a few straightforward steps. The quickest solution involves resetting the plug-in cache, which can be done without delving into the registry or manually deleting files. Users have two options: they can either reinstall VLC Media Player or utilize the built-in functionality to regenerate the cache by running vlc-cache-gen.exe.
For those opting to reset preferences and cache files, simply click on the search icon in the bottom left-hand corner of the screen, type in “VLC,” and select the top result labeled VLC media player – reset preferences and cache files. Executing this will effectively reset the settings and cache, allowing for a smoother user experience.
As the situation stands, Microsoft has yet to issue a formal response or provide a fix for the Defender-related issues. Consequently, users may find themselves facing recurring problems unless they take preventive measures. One such measure includes setting an exclusion in Microsoft Defender for VLC Media Player, which instructs the antivirus not to scan the application’s directory for potential threats. However, users should exercise caution with this approach, particularly if VLC was not downloaded from the official source.
To set this exclusion in Microsoft Defender on Windows 10, users can navigate through the settings to ensure that VLC Media Player is protected from unnecessary scans, thereby enhancing its performance and usability.
