I have been trying to save movie maker project to mp4 for you tube and I end up with all kinds of problems.  First off I noticed, once saved which took hours, that the videos all have a constant flickering of light through them.  It is unusable.  I then upgraded my Windows 10 to the Anniversary Upgrade.  Now the videos won't save at all and I get messages that various clips (which change each time I try again) are corrupt and the project can't be saved unless I remove them. 

I have saved numerous projects before without any issues.  Could it be an update to Windows 10 that is causing the problem?  Is Windows 10 not compatible?

I have tried uninstalling, reinstalling, repairing Windows Essential to saving to different formats, saving with different bit rate, redoing the whole project!  and nothing is working.

Any suggestions please.   Anyone else experiencing problems with saving or light flickering once the project does save?