I've been using Movie Maker on Windows 8.1 over weeks and months without significant problems.

I'm creating a DVD with a combination of video clips and photos, this is one in a series of many which I have successfully completed.

Yesterday it was working fine. Today when I try to use the "split" editing tool on video clips, it doesn't effect the split and when I try to move the cursor, video frames "white out". I have tried the Microsoft help desk who have referred me to this forum.

I'm not aware of any changes to my PC overnight e.g. updates and cannot work out why it has suddenly stopped working?

The help desk installed Windows Essentials but that hasn't solved the problem.

Help please!