+1000 on that. I only record in 720p at 60fps. Most display resolutions for laptops/ipads/iphones etc have a max rendering of 720p anyway. 1080 is usually reserved for occasional high, high end devices and TV's which people aren't running their vids through the tv. The fps (frames per second) is more important in my opinion. The fps captures more images 60 during a second compared to 30 with the lower setting. The more images make for a more continuous image presentation. Think about if you were to draw a filp cartoon in the corner of a notebook, if you have more minute changes, then the smoother the cartoon is when you flip through.
I would check for an update for WMM. If not look up what the error code is for. Probably the most common one is if are not trying to use the right file type. When I use my GoPro I would go through cineform in the following process, Import, select a short segment/clip, then convert, then I would export the clips as mp4 so that I could send it to WMM. WMM only likes AVI and MP4, and it will not work work with MOV files.
