I use windows7.Recently I downloaded windows essentials 2012 & decided to try out the movie maker.Earlier I have used Movie Maker 2.6 but that had it's own drawbacks.Moreover the Movie maker that came with the windows essentials provided some advanced features.

Everything went fine till I saved my video.But when I tried to play the file the screen went blank.The audio was alright,but the video was totally blank.I tried different sorts of media players including VLC but the result was the same.I guessed that there was a problem with the codes & downloaded K-lite codec pack but the problem persisted.My original file was in MP4 format,hence I tried to solve the problem by converting it in WMV format,but again I got the same black screen.