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This morning minecraft was working perfectly but this afternoon I tried 1.8.3 and it crashed without loading anything but with no crash report as well. Then I tried minecraft 1.7.10 and it crashed as soon as I loaded a world and or any of my worlds for that matter with this crash report.

--- Minecraft Crash Report ----

// Ooh. Shiny.

Time: 4/13/15 7:14 PM

Description: Starting integrated server

com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING at line 1 column 1

at com.google.gson.Gson.fromJson(Gson.java:815)

at com.google.gson.Gson.fromJson(Gson.java:768)

at ns.b(SourceFile:156)

at ns.<init>(SourceFile:42)

at net.minecraft.server.MinecraftServer.<init>(SourceFile:114)

at bsx.<init>(SourceFile:38)

at bao.a(SourceFile:1610)

at bdx.e(SourceFile:162)

at bdx.a(SourceFile:127)

at bdw.a(SourceFile:172)

at bdw.k(SourceFile:232)

at bdw.p(SourceFile:211)

at bao.p(SourceFile:1328)

at bao.ak(SourceFile:774)

at bao.f(SourceFile:728)

at net.minecraft.client.main.Main.main(SourceFile:148)

Caused by: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING at line 1 column 1

at com.google.gson.stream.JsonReader.beginArray(JsonReader.java:338)

at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:79)

at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60)

at com.google.gson.Gson.fromJson(Gson.java:803)

... 15 more

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

---------------------------------------------------------------------------------------

-- Head --

Stacktrace:

at com.google.gson.Gson.fromJson(Gson.java:815)

at com.google.gson.Gson.fromJson(Gson.java:768)

at ns.b(SourceFile:156)

at ns.<init>(SourceFile:42)

at net.minecraft.server.MinecraftServer.<init>(SourceFile:114)

at bsx.<init>(SourceFile:38)

-- Starting integrated server --

Details:

Level ID: Clock Town

Level Name: Clock Town

Stacktrace:

at bao.a(SourceFile:1610)

at bdx.e(SourceFile:162)

at bdx.a(SourceFile:127)

at bdw.a(SourceFile:172)

at bdw.k(SourceFile:232)

at bdw.p(SourceFile:211)

-- Affected screen --

Details:

Screen name: bee

Stacktrace:

at bao.p(SourceFile:1328)

at bao.ak(SourceFile:774)

at bao.f(SourceFile:728)

at net.minecraft.client.main.Main.main(SourceFile:148)

-- System Details --

Details:

Minecraft Version: 1.7.10

Operating System: Windows 8.1 (amd64) version 6.3

Java Version: 1.8.0_25, Oracle Corporation

Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation

Memory: 147102160 bytes (140 MB) / 184012800 bytes (175 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

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: 1.7.10

LWJGL: 2.9.1

OpenGL: Intel(R) HD Graphics 4400 GL version 4.2.0 - Build 10.18.10.3496, Intel

GL Caps: Using GL 1.3 multitexturing.

Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.

Anisotropic filtering is supported and maximum anisotropy is 16.

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: []

Current Language: English (US)

Profiler Position: N/A (disabled)

Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used

Anisotropic Filtering: Off (1)

Please Help me!!

I believe that is something with corrupted json files.

Yes I have tried ill just reinstall it then. I think webroot accidently erased something but I just wanted to be sure. Thanks