Sound Does Not Sync Correctly – Movie Maker

I'm trying to make a lyric video on Movie Maker, but the audio is only syncing correctly in some displays (fullscreen and mini screen). In the mini screen (the screen to the left where you see your video), it syncs correctly if I begin the video from the beginning but not when I skip to another part. For example, if I skip to another part, the audio gets about two seconds added and is not synced with the lyrics. The same thing happens with fullscreen - if I start from the beginning it's fine, but if I skip and then open fullscreen the audio gets about two seconds added. I've used Movie Maker before on Windows 7 and it's worked fine, but I upgraded to a new computer that has Windows 10 and it's just beginning to have problems. If anyone could help me it would be greatly appreciated! (Apologies if this post isn't very clear of what my problem is; I wasn't sure how to word it.)