Cannot Unzip

I'm using the new 1.6 launcher. I've only used the previous launcher, as well as the Magiclauncher before. I started up the launcher, and pressed play. It got quite a ways in, and I took a nap so I don't know where it is. When I woke up, it stopped and the "Play" button was greyed out. In the development console, the message follows:

"Job 'Resources' finished successfully
Launching game
Looking for old natives to clean up...
Deleting C:\Users\Kevin\AppData\Roaming\.minecraft\versions\1.6.1\1.6.1-natives-482966472488824
Unpacking natives to C:\Users\Kevin\AppData\Roaming\.minecraft\versions\1.6.1\1.6.1-natives-513450439310859
Couldn't unpack natives!
java.util.zip.ZipException: error in opening zip file
	at java.util.zip.ZipFile.open(Native Method)
	at java.util.zip.ZipFile.<init>(Unknown Source)
	at java.util.zip.ZipFile.<init>(Unknown Source)
	at java.util.zip.ZipFile.<init>(Unknown Source)
	at net.minecraft.launcher.GameLauncher.unpackNatives(GameLauncher.java:322)
	at net.minecraft.launcher.GameLauncher.launchGame(GameLauncher.java:165)
	at net.minecraft.launcher.GameLauncher.onDownloadJobFinished(GameLauncher.java:447)
	at net.minecraft.launcher.updater.download.DownloadJob.popAndDownload(DownloadJob.java:95)
	at net.minecraft.launcher.updater.download.DownloadJob.access$000(DownloadJob.java:10)
	at net.minecraft.launcher.updater.download.DownloadJob$1.run(DownloadJob.java:65)
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
"

I checked, the zip file that it mentions is not there, only the jar, json, and "1.6.1-natives-513450439310859" folder is there.