Problem with Windows Movie Maker

Every time I use Windows Movie Maker, I have to constantly save it because an error message appears and closes what I have. It seems to happen faster when I put multiple pictures in at once, any ideas?

MAybe due to the picture format is not consistent!

What are you trying to do? Windows Movie Maker isn’t very good, and better software exists — both freeware, low-cost software, and some higher end professional software.

WMM just doesn’t cut it much of the time.

What would be your best thing to use? I mean besides WMM?

You may try AVS Video Editor which has many great functions. The features in the official site are below:
1. Direct Transfer to iPod, PSP, Mobiles and Other Portable Players
2. Supports Virtually ALL Video Formats
3. Burn Movie DVDs
4. Capture and Edit Video from External Devices
5. Edit Video and Enhance Your Movies
6. Create Slide Shows
7. Make Perfect Audio for Your Video Editing Tasks
8. Scene Detection
9. Convenient Video Editing Tools and Interface

So I recommend you this tool,you can see detail and guides:

Free download link: http://www.avs4you.com/AVS-Video-Editor.aspx?sct=aff&ct=regnow&cid=175028
Also, you can use Premiere which may be difficult for us:
http://www.adobe.com

I hope this may help you