At least Winamp can play the most .wmv-files. If a .wmv-file cannot be played by Winamp, then it also cannot be played by IrfanView.
I have a few buggy .wmv-files, made with a buggy update of a video-converter by Hamstersoft, which I uninstalled later. Only Windows Media Player can play them.
The most .wmv-files had been made with Windows Movie Maker, before I used also MAGIX Video Deluxe 17 Premium. And after Winamp had come onto my PC the first time, they got their first plays directly in Winamp, before they came to YouTube...
