I have windows movie maker with the most recent build from windows essentials 2012. Ive done many hours of trouble shooting. My graphics are up to date. I used a codec fixer and that had be disable some xvid thing, and that made it worse(nothing except audio would work). So as of now normally i can see an into video i use which is a previously editted mp4 video from movie maker. but my other clips im adding in after it that are also mp4 take forever to load. maybe like 15 minutes to load a 30 second clip. and if i pause it it needs to reload it. or go off the clip and come back it needs to reload it. when i add in audio or images i can view those. also when i go to save. its stuck at 0% on step 1 of 2. if you need any information please comment and ill add it in. any help is much appreciated. thank you loads! this has been causing me loads of trouble and as im trying to make money off of making videos its very crucial i figure this out. and nothing im doing is helping.