errore anomalo

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perché quando apro un normalissimo mondo su minecraft (premium) dopo qualche secondo mi si chiude il launcher dicendo "errore anomalo"????

mentre per i server multiplayer mi da problemi per java (java.lang.nullpointerexcepition: Group)

la scheda video e java sono aggiornati cosa potrebbe essere?

ecco cosa c'è scritto nei crash-reports:

---- Minecraft Crash Report ----
// Shall we play a game?

Time: 9/25/17 10:34 PM
Description: Updating screen events

java.lang.IllegalStateException: failed to create a child event loop
 at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:88)
 at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:58)
 at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:47)
 at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:58)
 at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:77)
 at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:72)
 at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:59)
 at oz$1.a(SourceFile:61)
 at oz$1.b(SourceFile:58)
 at rh.c(SourceFile:10)
 at oz.a(SourceFile:152)
 at bib.a(SourceFile:2209)
 at bol.e(SourceFile:229)
 at bol.a(SourceFile:182)
 at bol.a(SourceFile:148)
 at bjm.a(SourceFile:41)
 at bok.a(SourceFile:117)
 at blk.k(SourceFile:400)
 at bok.k(SourceFile:49)
 at blk.q(SourceFile:377)
 at bib.t(SourceFile:1625)
 at bib.az(SourceFile:1000)
 at bib.a(SourceFile:419)
 at net.minecraft.client.main.Main.main(SourceFile:123)
Caused by: io.netty.channel.ChannelException: failed to open a new selector
 at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:157)
 at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:149)
 at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:127)
 at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:36)
 at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:84)
 ... 23 more
Caused by: java.io.IOException: Unable to establish loopback connection
 at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:101)
 at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:68)
 at java.security.AccessController.doPrivileged(Native Method)
 at sun.nio.ch.PipeImpl.<init>(PipeImpl.java:170)
 at sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:50)
 at java.nio.channels.Pipe.open(Pipe.java:155)
 at sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:127)
 at sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)
 at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:155)
 ... 27 more
Caused by: java.net.SocketException: Unrecognized Windows Sockets error: 10106: socket
 at sun.nio.ch.Net.socket0(Native Method)
 at sun.nio.ch.Net.serverSocket(Net.java:419)
 at sun.nio.ch.ServerSocketChannelImpl.<init>(ServerSocketChannelImpl.java:88)
 at sun.nio.ch.SelectorProviderImpl.openServerSocketChannel(SelectorProviderImpl.java:56)
 at java.nio.channels.ServerSocketChannel.open(ServerSocketChannel.java:108)
 at sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:123)
 at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:83)
 ... 35 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:88)
 at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:58)
 at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:47)
 at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:58)
 at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:77)
 at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:72)
 at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:59)
 at oz$1.a(SourceFile:61)
 at oz$1.b(SourceFile:58)
 at rh.c(SourceFile:10)
 at oz.a(SourceFile:152)
 at bib.a(SourceFile:2209)
 at bol.e(SourceFile:229)
 at bol.a(SourceFile:182)
 at bol.a(SourceFile:148)
 at bjm.a(SourceFile:41)
 at bok.a(SourceFile:117)
 at blk.k(SourceFile:400)
 at bok.k(SourceFile:49)
 at blk.q(SourceFile:377)

-- Affected screen --
Details:
 Screen name: bli
Stacktrace:
 at bib.t(SourceFile:1625)
 at bib.az(SourceFile:1000)
 at bib.a(SourceFile:419)
 at net.minecraft.client.main.Main.main(SourceFile:123)

-- System Details --
Details:
 Minecraft Version: 1.12.2
 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: 118532928 bytes (113 MB) / 310013952 bytes (295 MB) up to 1060372480 bytes (1011 MB)
 JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
 IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
 Launched Version: 1.12.2
 LWJGL: 2.9.4
 OpenGL: Intel(R) HD Graphics 3000 GL version 3.1.0 - Build 9.17.10.4229, Intel
 GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 text

 

spero di essermi spiegato per favore aiutatemi.