Transferring Audio To Computer Loses Part of Recording

When I edit a long audio clip to cut out part of it and then save it to my computer, it will cut off part of the recording.

For example, I edited a 1 hour and 34 minute audio clip down to 1 hour 17 minutes and 30 seconds. When I saved it to my computer, it only would save 1 hour 17 minutes and 1 second. The odd thing is that when I play it on windows media player, it will play the whole thing, even though the file is 30 seconds short.
The problem comes when I try to upload the audio to Windows Movie Maker, it only uploads the shortened version, cutting off the last 30 seconds. The Geek Squad couldn’t help, can any of you?

My guess is that you are exporting as MP3.
There’s a known (and very old) bug in Windows Media Player where it reports the wrong length for VBR encoded MP3 files. Microsoft have been aware of this bug for over a decade, but choose not to fix it.

That’s probably a similar bug in Windows Movie Maker.

I’d suggest that you try exporting from Audacity in WAV format (which has the added benefit of keeping the sound quality a fraction better).