Can you please give some more information? What type of format is the video? How does it run on other media players? Has it always been doing this with VLC media player? Stuff…?
But here are some quick suggestions anyway:
- 1. Upgrade to the latest video and sound card drivers.
2. If it works fine in other media players, upgrade to the latest version of VLC.
3. Still not working? Reset the preferences folder: C:/Documents and Settings/User (Your user name)/Application Data (this folder is hidden, you have to make it visible)/vlc. Delete the “vlc” folder.
Hopefully one of them will work for you.
(edit?)