If you can't import video or audio files into Easy Video Maker, please
1. Simply re-install Easy Video Maker(Uninstall first, then re-install), then try again.
2. If you can't import some special format video or audio files on Win7 or Win8, maybe "Microsoft DTV-DVD Video Decoder" or "Microsoft DTV-DVD Audio Decoder" problem, please try below solution.
How to Disable Microsoft DTV-DVD Decoder temporarily