How to convert QuickTime files to WMV?

I'm trying to edit videos on Windows Live Movie Maker but it wont accept videos from my camera because they are QuickTime files. Is there any way I can convert the files to WMV or change my camera setting to make them different files? My camera is a Nikon Coolpix L820 but my previous camera was a Fujifilm Finepix and the editor accepted files from that camera with the same memory card

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Want to buy a Nixon Coolpix L830?

Nikon COOLPIX L830 16 MP CMOS Digital Camera with 34x Zoom NIKKOR Lens and Full 1080p HD Video

I would like to purchase this camera, but don't know to well about cameras, as I only have a basic camera. I would use this camera for taking pictures of my kiddos, and to take outdoor night pictures (music band members) I would like to also know if they have a self timer, other than using your smart phone, as I saw in the video they demonstrated. Would this camera be good for beginners trying to take awesome picture?

Read more: Want to buy a Nixon Coolpix L830?