While Windows Live Movie Maker has many redeeming qualities, the simplification of the experience also meant the team hid the ability to access media such as movie clips off a network drive.  Turns out, this can be a major contributor to project crashes and issues if you’re trying to share over weak wireless networks.  This was a big disappointment for those of us with large home video libraries on Windows Home Server and stable home networks.  I’ve since resolved the issue thanks to the following post – yes, you can re-enable network drive support.  Read the How To: here, courtesy Andreas J on the Windows Live team.

How To Movies network share Tech Windows 7 Windows Movie Maker