Download_in_x-matroska.aspx

This happens when a website's server (running on the Microsoft ASP.NET framework) is configured to serve a file, but your browser fails to recognize the correct file type and saves it with the server's internal file extension (.aspx) instead. Quick Fix: Rename the File

The most effective way to "fix" this content is to manually change the file extension back to its intended format. the downloaded file in your folder. Right-click it and select Rename . Change the ending from .aspx to .mkv . download_IN_x-matroska.aspx

the change. You should now be able to open the file in a media player like VLC Media Player or Windows Media Player . Why This Happens This happens when a website's server (running on