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I installed optifine to it the other day, and it worked fine. After exiting and then re-logging, however, it stopped launching. It would just stay stuck saying "launching...". So, I thought for a moment as to what I was supposed to do, then I remembered that I should have deleted the META-INF file from the .minecraft. Afterwords, this happened.

------------------------------------------------------------------HEY, A LINE!-----------------------------------------------------



Minecraft has crashed!
----------------------

Minecraft has stopped running because it encountered a problem; Failed to start game

A full error report has been saved to C:\Users\user\AppData\Roaming\.technic\hexxit\crash-reports\crash-2013-10-08_08.55.36-client.txt - Please include a copy of that file (Not this screen!) if you report this crash to anyone; without it, they will not be able to help fix the crash



--- BEGIN ERROR REPORT 681b6a90 --------
Full report at:
C:\Users\user\AppData\Roaming\.technic\hexxit\crash-reports\crash-2013-10-08_08.55.36-client.txt
Please show that file to Mojang, NOT just this screen!

Generated 10/8/13 8:55 AM

-- System Details --
Details:
Minecraft Version: 1.5.2
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 125320424 bytes (119 MB) / 276627456 bytes (263 MB) up to 954466304 bytes (910 MB)
JVM Flags: 1 total; -Xmx1024m
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML:
LWJGL: 2.4.2
OpenGL: AMD Radeon HD 6320 Graphics GL version 4.1.11079 Compatibility Profile Context, ATI Technologies Inc.
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Texture Pack: Default
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

java.lang.NullPointerException
at net.minecraft.client.gui.FontRenderer.getFontTexturePack(FontRenderer.java:1144)
at net.minecraft.client.gui.FontRenderer.func_98306_d(FontRenderer.java:222)
at net.minecraft.client.gui.FontRenderer.func_98304_a(FontRenderer.java:150)
at net.minecraft.client.gui.FontRenderer.<init>(FontRenderer.java:112)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:408)
at net.minecraft.client.MinecraftAppletImpl.func_71384_a(SourceFile:56)
at net.minecraft.client.Minecraft.run(Minecraft.java:733)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 48a8689b ----------

I tried to install optifine to to hexxit and it dosent work if you are laggy jus put more ram to it in the launcher