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My minecraft client keeps crashing when i click the play button, it loads the "Mojang" logo, but then crashes! Any tips?

(P.S. When i played the 1.11.2 snapshot, it didnt crash, but it freezes my computer sometimes so i have to restart my computer, is this a problem to my computer?)

Here's the crash log:

Quote from HaroldDaWicked05»

My minecraft client keeps crashing when i click the play button, it loads the "Mojang" logo, but then crashes! Any tips?

(P.S. When i played the 1.11.2 snapshot, it didnt crash, but it freezes my computer sometimes so i have to restart my computer, is this a problem to my computer?)

Here's the crash log:

---- Minecraft Crash Report ----
// This is a token for 1 free hug. Redeem at your nearest Mojangsta: [~~HUG~~]

Time: 4/6/17 2:14 PM
Description: Initializing game

java.lang.NoClassDefFoundError: com/mojang/text2speech/Narrator
at bhl.(SourceFile:11)
at bhg.(SourceFile:130)
at bgr.an(SourceFile:531)
at bgr.a(SourceFile:381)
at net.minecraft.client.main.Main.main(SourceFile:123)
Caused by: java.lang.ClassNotFoundException: com.mojang.text2speech.Narrator
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 5 more

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

-- Head --
Thread: Client thread
Stacktrace:
at bhl.(SourceFile:11)
at bhg.(SourceFile:130)
at bgr.an(SourceFile:531)

-- Initialization --
Details:
Stacktrace:
at bgr.a(SourceFile:381)
at net.minecraft.client.main.Main.main(SourceFile:123)

-- System Details --
Details:
Minecraft Version: 17w14a
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.8.0_121, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 54831672 bytes (52 MB) / 196845568 bytes (187 MB) up to 523501568 bytes (499 MB)
JVM Flags: 6 total; -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M -XX:MaxPermSize=256M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 17w14a
LWJGL: 2.9.4
OpenGL: GeForce 6150SE nForce 430/integrated/SSE2/3DNOW! GL version 2.1.2, NVIDIA Corporation
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because ARB_framebuffer_object is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: Yes
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)
CPU: 2x AMD Athlon(tm) II X2 250 Processor

You may need to reinstall the locally installed files that Minecraft puts into place.
To do so, press your Windows+R keys, type in %AppData% at the dialog, and press Enter. In the window that appears, open the .minecraft directory, and delete everything except for the saves directory that you see therein. Then, try running Minecraft again. Good luck!