Launcher 1.0.7 (through bootstrap 4) started on windows...
System.getProperty('os.name') == 'Windows 7'
System.getProperty('os.version') == '6.1'
System.getProperty('os.arch') == 'amd64'
System.getProperty('java.version') == '1.7.0_17'
System.getProperty('java.vendor') == 'Oracle Corporation'
Going to log in with legacy stored username & password...
Loaded 1 profile(s); selected '1.6.1'
Trying to log in...
Logging in with access token
Logged in successfully
Delta time to compare resources: 1700 ms 
Download job 'Resources' skipped as there are no files to download
Job 'Resources' finished successfully
Getting syncinfo for selected version
Queueing library & version downloads
Download job 'Version & Libraries' started (8 threads, 1 files)
Finished downloading C:\Users\nieuwe gebruiker\AppData\Roaming\.minecraft\versions\1.6.1\1.6.1.jar for job 'Version & Libraries': Used own copy as it matched etag
Job 'Version & Libraries' finished successfully
Launching game
Looking for old natives to clean up...
Deleting C:\Users\nieuwe gebruiker\AppData\Roaming\.minecraft\versions\1.6.1\1.6.1-natives-339024744024691
Unpacking natives to C:\Users\nieuwe gebruiker\AppData\Roaming\.minecraft\versions\1.6.1\1.6.1-natives-339347746346005
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)