ever since 1.9 first came up no servers or single player worlds will work, this is not the same issue where Vsync and VBO's aren't on. i have no clue what is wrong with it

i haven't played minecraft i a while since this started happening, and it is really annoying.
now every time i try to go into a singleplayer world or server my game crashes and i get an error report, every time i publish the report but nothing seems to be helping.

The following is the crash report, i'm not sure if this will help or not, but if it does then here you go.

---- Minecraft Crash Report ----
// My bad.

Time: 15/05/16 00:30
Description: Updating screen events

java.lang.IllegalStateException: failed to create a child event loop
	at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:68)
	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 mb$1.a(SourceFile:61)
	at mb$1.b(SourceFile:58)
	at ok.c(SourceFile:10)
	at mb.a(SourceFile:138)
	at bcd.a(SourceFile:2142)
	at bhl.e(SourceFile:227)
	at bhl.a(SourceFile:182)
	at bhl.a(SourceFile:148)
	at bdj.b(SourceFile:41)
	at bhk.a(SourceFile:118)
	at bez.k(SourceFile:404)
	at bhk.k(SourceFile:50)
	at bez.p(SourceFile:381)
	at bcd.t(SourceFile:1582)
	at bcd.av(SourceFile:969)
	at bcd.a(SourceFile:399)
	at net.minecraft.client.main.Main.main(SourceFile:124)
Caused by: io.netty.channel.ChannelException: failed to open a new selector
	at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:128)
	at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:120)
	at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:87)
	at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:64)
	... 20 more
Caused by: java.io.IOException: Unable to establish loopback connection
	at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:101)
	at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:68)
	at java.security.AccessController.doPrivileged(Native Method)
	at sun.nio.ch.PipeImpl.<init>(PipeImpl.java:170)
	at sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:50)
	at java.nio.channels.Pipe.open(Pipe.java:155)
	at sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:127)
	at sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)
	at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:126)
	... 23 more
Caused by: java.net.BindException: Cannot assign requested address: bind
	at sun.nio.ch.Net.bind0(Native Method)
	at sun.nio.ch.Net.bind(Net.java:436)
	at sun.nio.ch.Net.bind(Net.java:428)
	at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:214)
	at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
	at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:67)
	at sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:124)
	at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:83)
	... 31 more


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

-- Head --
Thread: Client thread
Stacktrace:
	at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:68)
	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 mb$1.a(SourceFile:61)
	at mb$1.b(SourceFile:58)
	at ok.c(SourceFile:10)
	at mb.a(SourceFile:138)
	at bcd.a(SourceFile:2142)
	at bhl.e(SourceFile:227)
	at bhl.a(SourceFile:182)
	at bhl.a(SourceFile:148)
	at bdj.b(SourceFile:41)
	at bhk.a(SourceFile:118)
	at bez.k(SourceFile:404)
	at bhk.k(SourceFile:50)
	at bez.p(SourceFile:381)

-- Affected screen --
Details:
	Screen name: bex
Stacktrace:
	at bcd.t(SourceFile:1582)
	at bcd.av(SourceFile:969)
	at bcd.a(SourceFile:399)
	at net.minecraft.client.main.Main.main(SourceFile:124)

-- System Details --
Details:
	Minecraft Version: 1.9.4
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.8.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 159138704 bytes (151 MB) / 415760384 bytes (396 MB) up to 1908932608 bytes (1820 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G
	IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
	Launched Version: 1.9.4
	LWJGL: 2.9.4
	OpenGL: GeForce 405/PCIe/SSE2 GL version 3.3.0, NVIDIA Corporation
	GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

	Using VBOs: Yes
	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)
	CPU: bcd$7@6d658aa8