Extension: wmv
What is it? Windows Media Video File
Where’s it from? Audio/video file format developed by Microsoft. Many authoring programs can create wmv files.
How do I use it? Windows: Media Player; Mac: Quicktime, with Windows Media Components for Quicktime; Linux: MPlayer, with WMV Codecs for MPlayer
Can I safely delete or move it? Yes.
Can it be dangerous? Yes. Use antivirus software
–David Hakala