We are unable to create a world to play

Hi, we are trying to play minecraft. We were able to download the game, however everytime (at least 10 times) we try to create a world to start playing the pc verision, we receive an error message like this:

---- Minecraft Crash Report ----
// You should try our sister game, Minceraft!

Time: 12/28/13 2:43 PM
Description: Starting integrated server

java.lang.ExceptionInInitializerError
	at net.minecraft.server.MinecraftServer.<init>(SourceFile:113)
	at btk.<init>(SourceFile:38)
	at azi.a(SourceFile:1590)
	at bbq.a(SourceFile:202)
	at bcl.a(SourceFile:172)
	at bbq.a(SourceFile:301)
	at bcl.d(SourceFile:232)
	at bcl.k(SourceFile:211)
	at azi.p(SourceFile:1308)
	at azi.ah(SourceFile:760)
	at azi.f(SourceFile:711)
	at net.minecraft.client.main.Main.main(SourceFile:152)
Caused by: java.lang.IllegalStateException: failed to create a child event loop
	at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:61)
	at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:49)
	at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:61)
	at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:52)
	at mv.<clinit>(SourceFile:31)
	... 12 more
Caused by: io.netty.channel.ChannelException: failed to open a new selector
	at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:128)
	at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:120)
	at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:87)
	at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:57)
	... 16 more
Caused by: java.io.IOException: Unable to establish loopback connection
	at sun.nio.ch.PipeImpl$Initializer.run(Unknown Source)
	at sun.nio.ch.PipeImpl$Initializer.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at sun.nio.ch.PipeImpl.<init>(Unknown Source)
	at sun.nio.ch.SelectorProviderImpl.openPipe(Unknown Source)
	at java.nio.channels.Pipe.open(Unknown Source)
	at sun.nio.ch.WindowsSelectorImpl.<init>(Unknown Source)
	at sun.nio.ch.WindowsSelectorProvider.openSelector(Unknown Source)
	at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:126)
	... 19 more
Caused by: java.net.SocketException: Permission denied: listen
	at sun.nio.ch.Net.listen(Native Method)
	at sun.nio.ch.ServerSocketChannelImpl.bind(Unknown Source)
	at sun.nio.ch.ServerSocketAdaptor.bind(Unknown Source)
	at sun.nio.ch.ServerSocketAdaptor.bind(Unknown Source)
	... 28 more


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at net.minecraft.server.MinecraftServer.<init>(SourceFile:113)
	at btk.<init>(SourceFile:38)

-- Starting integrated server --
Details:
	Level ID: Keldog
	Level Name: Keldog
Stacktrace:
	at azi.a(SourceFile:1590)
	at bbq.a(SourceFile:202)
	at bcl.a(SourceFile:172)
	at bbq.a(SourceFile:301)
	at bcl.d(SourceFile:232)
	at bcl.k(SourceFile:211)

-- Affected screen --
Details:
	Screen name: bct
Stacktrace:
	at azi.p(SourceFile:1308)
	at azi.ah(SourceFile:760)
	at azi.f(SourceFile:711)
	at net.minecraft.client.main.Main.main(SourceFile:152)

-- System Details --
Details:
	Minecraft Version: 1.7.4
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_21, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 58788080 bytes (56 MB) / 95367168 bytes (90 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 1.7.4
	LWJGL: 2.9.1
	OpenGL: Intel(R) G45/G43 Express Chipset GL version 2.1.0 - Build 8.15.10.2141, Intel
	GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because EXT_framebuffer_object is supported.
Anisotropic filtering is supported and maximum anisotropy is 2.
Shaders are available because OpenGL 2.1 is supported.

	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null
	Anisotropic Filtering: Off (1)