In this tutorial, i will show you how to install Movie Maker on Windows Vista or 7. For those systems is recommended Live Movie Maker, but some users more like older version.
Some installations or settings changes require you to restart your computer. In most cases you don't need to actually reboot it, you only need to restart the explorer.exe process.
With time it can happen you have a bunch of installed apps on your Windows Phone 8 powered phone you never use anymore, I suggest you to remove them to free some of the storage.