Windows Movie Maker is Making All My Videos Blurry. How Do I Fix It?

I looked this up and all I was able to find tutorials on Youtube about this is to go to Advanced and uncheck the two boxes that deal with making the program easier to edit. This did not fix my problem. The blurriness was still there after I closed the program and re-opened it. The picture quality in my videos is terrible and looks almost smeared. I heard that there is some way to find a compatability mode and set it for your operating system and that might fix some problems but all I find are options to uninstall the program. I am using Windows 8.1 operating system.