I am working on a Windows 7 with windows movie maker from Windows Essentials 2012.

Saving movie gets stuck sometimes at some points (12% 26%...) and the hole system stops responding. After waiting a couple of hours, the system gets back to normal performance and the video is saved. The files in the project are .avi videos. I've tried to save a project with only a JPEG image but still the saving process takes hours and my hole computer stops responding as well.

To sum up, my computer stops working every time I save a video no matter how big it is.

Any help? thank you :)