I' have problem with my minecraft, the bug is: I' can't open minecraft on version13w47c, after 10 try's I've openet the bugtracker and searched something about it, there is more of this accidents, here's my note from launcher : ---- Minecraft Crash Report ----
// Ouch. That hurt

Time: 21.11.13 20:39
Description: Initializing game

java.lang.UnsatisfiedLinkError: C:\Documents and Settings\Jolanka\Dane aplikacji\.minecraft\versions\13w47c\13w47c-natives-11262588394055\libmfxsw32.dll: Nie można odnaleźć określonej procedury
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary1(Unknown Source)
at java.lang.ClassLoader.loadLibrary0(Unknown Source)
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.loadLibrary0(Unknown Source)
at java.lang.System.loadLibrary(Unknown Source)
at buw.<clinit>(SourceFile:125)
at azg.ab(SourceFile:385)
at azg.e(SourceFile:706)
at net.minecraft.client.main.Main.main(SourceFile:151)

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

– Head –
Stacktrace:
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary1(Unknown Source)
at java.lang.ClassLoader.loadLibrary0(Unknown Source)
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.loadLibrary0(Unknown Source)
at java.lang.System.loadLibrary(Unknown Source)
at buw.<clinit>(SourceFile:125)
at azg.ab(SourceFile:385)

– Initialization –
Details:
Stacktrace:
at azg.e(SourceFile:706)
at net.minecraft.client.main.Main.main(SourceFile:151)

– System Details –
Details:
Minecraft Version: 13w47c
Operating System: Windows XP (x86) version 5.1
Java Version: 1.7.0_45, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
Memory: 1758040 bytes (1 MB) / 26808320 bytes (25 MB) up to 518979584 bytes (494 MB)
JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -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: 13w47c
LWJGL: 2.9.1
OpenGL: ATI Radeon 9600/9550/X1050 Series GL version 2.1.8545 Release, ATI Technologies Inc.
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: []
Current Language: ~_ERROR~ NullPointerException: null
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~_ERROR~ NullPointerException: null
Anisotropic Filtering: Off (1)
Tried to reinstall game, nothing actualy works. At some time minecraft has bugged in 1.7.2, when I'll go to single-player menu my screen is totaly bugged off (stone and dirt like blocks in world selection, nothing shows, minecraft doesn't crashes)PLS FIX IT.