I was stuck in windows 10 nothing worked not WinFF nor other tons of converters i tried, including online ones. Finally i found a way that worked for me.
1- Convert your videos with some "mp4 to wmv" converter because the app below wont open mp4 files
2 -Download and Install "Microsoft Expression Encoder 4"
3- Import your video to Expression Encoder 4 ---> In the right side you'll see Presets ----> Select "VC-1 Xbox 360 HD 720" -----> Click Encode
Your output will be somwhere like : C:\Users\...\Documents\Expression\Expression Encoder\Output
Just wanted to leave this here maybe someone will find it usefull
