Windows movie maker’s audio offset (after export)

I'm fairly new to windows movie maker, and I've ran into one issue I can't solve simply with trial and error.  

issue: While watching my video in the preview tab, the audio is perfectly in sync, but after I save the file onto my desktop (hard-drive), The audio is pushed back by about 2 seconds. 

I don't know what is causing this, and it would be greatly appreciated if this could be answered as soon as possible.

Additional Information: 

-The video is 51 minutes long

-I am exporting for High-Definition Display

-The video is very minimalistic (it only has raw footage thrown together)

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