I sure do understand your problem and I would suggest you to visit Movavi VideoSuite ? It supports to convert WMV to AVI, MPEG, MP4, DivX, VOB or any other popular video format. Hope this will work out for you.
I have a WMV video and I need it in any of the following formats: MP3, MPEG, AVI, MPA, MOV, QT, SWF, to upload to a website. How can I convert to any of these?