Minecraft stops responding when I start it up

I paused the game for a moment to change my texture pack, but right after I changed it, the game froze up and wouldn't respond.
I closed it down and restarted it, but it froze up (again). I ignored it for a moment because it freezes sometimes when I start it, but then starts responding again. It didn't respond, but it crashed and closed, then it went back to the launcher which said the following:

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

Time: 02/02/14 11:35
Description: Registering texture

bqr: Unable to fit: grass_side_snowed - size: 256x256 - Maybe try a lowerresolution resourcepack?
	at bqo.c(SourceFile:56)
	at bqs.b(SourceFile:203)
	at bqs.a(SourceFile:90)
	at bqy.a(SourceFile:72)
	at bqy.a(SourceFile:61)
	at bqy.a(SourceFile:52)
	at azi.ad(SourceFile:422)
	at azi.f(SourceFile:696)
	at net.minecraft.client.main.Main.main(SourceFile:152)


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

-- Head --
Stacktrace:
	at bqo.c(SourceFile:56)
	at bqs.b(SourceFile:203)
	at bqs.a(SourceFile:90)

-- Resource location being registered --
Details:
	Resource location: minecraft:textures/atlas/blocks.png
	Texture object class: bqs
Stacktrace:
	at bqy.a(SourceFile:72)
	at bqy.a(SourceFile:61)
	at bqy.a(SourceFile:52)
	at azi.ad(SourceFile:422)

-- Initialization --
Details:
Stacktrace:
	at azi.f(SourceFile:696)
	at net.minecraft.client.main.Main.main(SourceFile:152)

-- System Details --
Details:
	Minecraft Version: 1.7.4
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.6.0_20, Sun Microsystems Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
	Memory: 139890072 bytes (133 MB) / 397672448 bytes (379 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	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) HD Graphics GL version 2.1.0 - Build 8.15.10.2189, 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: [Silent_Hill_Texture_Pack_256x_1.7.2.zip]
	Current Language: English (UK)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null
	Anisotropic Filtering: Off (1)