Can't open Minecraft 1.7.4?

this is my dev console i got a new PC and idk how to run for the first time with the new launcher Initializing Frame
Downloading bg_main.png...
TeamExtreme Launcher 2.1 started on windows...
System.getProperty('os.name') == 'Windows 8'
System.getProperty('os.version') == '6.2'
System.getProperty('os.arch') == 'x86'
System.getProperty('java.version') == '1.7.0_45'
System.getProperty('java.vendor') == 'Oracle Corporation'
Loaded 2 profile(s); selected 'Oakspirit'
Couldn't download resources
java.io.FileNotFoundException: https://s3.amazonaws.com/Minecraft.Resources/
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
at java.net.URL.openStream(Unknown Source)
at net.minecraft.launcher.updater.VersionManager.getResourceFiles(Unknown Source)
at net.minecraft.launcher.updater.VersionManager.downloadResources(Unknown Source)
at net.minecraft.launcher.Launcher$2.run(Unknown Source)
at java.util.concurrent.Executors$RunnableAdapter.call(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)

Download job 'Resources' skipped as there are no files to download
Job 'Resources' finished successfully
java.io.IOException: Server returned HTTP response code: 509 for URL: https://dl.dropboxusercontent.com/u/108 ... g_main.png
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
at java.net.URL.openStream(Unknown Source)
at net.minecraft.bootstrap.b.a(Unknown Source)
at net.minecraft.launcher.c.c.f$2.run(Unknown Source)

net.minecraft.launcher.authentication.exceptions.InvalidCredentialsException: Invalid username
at net.minecraft.launcher.authentication.yggdrasil.a.f(Unknown Source)
at net.minecraft.launcher.c.b.a.b.actionPerformed(Unknown Source)
at net.minecraft.launcher.c.b.a.c.actionPerformed(Unknown Source)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

Getting syncinfo for selected version
Queueing library & version downloads
An update to your launcher is available and is required to play 1.7.4. Please restart your launcher.

We need to see what is in your Development Console, which can be found on the second tab of the launcher.
First, copy all of the text: click on the text, then press Ctrl+A then Ctrl+C. Then paste it in spoiler tags in a reply for us to see.
How to use spoiler tags:
[SPOILER]text goes here[/SPOILER]

Moved. Please post your threads in the correct section, thanks

Its happening to me as well

Happenned to me before, I just did a virus scan and it worked again

Try Deleting that profile and making a new one