gen_ml.dll (media library winamp plugin) problem is a common issue in Windows Vista/Windows 7. Playback seemed to work for me, but startup was extremely slow and the screen froze for ten seconds. To avoid it you can do one of the following: Delete gen_ml.dll from plugins folder if you don’t need it (Recommended) (I tried renaming the file, but it still caused problems) Install KMP in a folder with admin rights. Run KMP with admin rights (right click on file -> properties) Disable UAC in Windows Vista (not recommended) Via: Access Violation on startup (gen_ml.dll)