First time posting a question, but I could really use some help,

I recently upgraded to Windows 10 from Windows 7. (Using first an upgrade to 8.1Pro). I used to edit and create videos with Windows Live Movie Maker on Win7 very easily, using various types of video files. Since I have upgraded my operating system, I have also upgraded the WLMM. Now I find that I cannot add or edit .mp4 or .mov files. Typically these are recorded from my iPhone and from my camera. I tried to convert them online to .wmv so I can play them, but every time I add a video, it immediately says that it is corrupted, and produces a cascade failure on my project. Sometimes it will allow a video or two to be loaded, but ultimately the last video causes a cascade failure of the files, one by one.

I have tried using the Microsoft fix-it tool, and it says that it is not supported for my operating system.

WLMM Version 2012

OS: Windows 10 ProComputer: Acer AspireOne

I'd appreciate your help!

-Jon