use Launcher to open minecraft Launcher crashes at different times during MC start. sometime 5 times before game starts.

What I expected to happen was...:
MC starts

What actually happened was...:
Completely ignored arguments: [--nativeLauncherVersion, 286]
[06:37:12] [Client thread/INFO]: Setting user: toddh39
[06:37:12] [Client thread/INFO]: (Session ID is token:8da0bcc5012e4794b36c1b8cbaa771e1:7c793e4154d74cf6b85784c5406303b4)
[06:37:13] [Client thread/INFO]: LWJGL Version: 2.9.4
[06:37:15] [Client thread/INFO]: Reloading ResourceManager: Default
[06:37:15] [Sound Library Loader/INFO]: Starting up SoundSystem...
[06:37:15] [Thread-5/INFO]: Initializing LWJGL OpenAL
[06:37:15] [Thread-5/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[06:37:15] [Thread-5/INFO]: OpenAL initialized.
[06:37:16] [Sound Library Loader/INFO]: Sound engine started
[06:37:25] [Client thread/INFO]: Created: 1024x512 textures-atlas
[06:37:32] [Client thread/ERROR]: Exception reading C:\Users\toddh39\AppData\Roaming\.minecraft\saves\New World 2014- overworld in nether\level.dat
java.util.zip.ZipException: Not in GZIP format
at java.util.zip.GZIPInputStream.readHeader(GZIPInputStream.java:165) ~[?:1.8.0_25]
at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:79) ~[?:1.8.0_25]
at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:91) ~[?:1.8.0_25]
at dx.a(SourceFile:24) ~[15w42a.jar:?]
at ayp.a(SourceFile:82) [15w42a.jar:?]
at ayp.c(SourceFile:66) [15w42a.jar:?]
at aym.b(SourceFile:57) [15w42a.jar:?]
at bfi.e(SourceFile:35) [15w42a.jar:?]
at bfi.<init>(SourceFile:28) [15w42a.jar:?]
at bfg.b(SourceFile:43) [15w42a.jar:?]
at bcw.a(SourceFile:367) [15w42a.jar:?]
at bag.a(SourceFile:863) [15w42a.jar:?]
at bdd.a(SourceFile:214) [15w42a.jar:?]
at bcw.a(SourceFile:341) [15w42a.jar:?]
at bdd.a(SourceFile:471) [15w42a.jar:?]
at bcw.k(SourceFile:404) [15w42a.jar:?]
at bcw.p(SourceFile:381) [15w42a.jar:?]
at bag.s(SourceFile:1546) [15w42a.jar:?]
at bag.as(SourceFile:931) [15w42a.jar:?]
at bag.a(SourceFile:379) [15w42a.jar:?]
at net.minecraft.client.main.Main.main(SourceFile:125) [15w42a.jar:?]
[06:37:32] [Client thread/ERROR]: Exception reading C:\Users\toddh39\AppData\Roaming\.minecraft\saves\New World 2014- overworld in nether\level.dat_old
java.util.zip.ZipException: Not in GZIP format
at java.util.zip.GZIPInputStream.readHeader(GZIPInputStream.java:165) ~[?:1.8.0_25]
at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:79) ~[?:1.8.0_25]
at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:91) ~[?:1.8.0_25]
at dx.a(SourceFile:24) ~[15w42a.jar:?]
at ayp.a(SourceFile:82) [15w42a.jar:?]
at ayp.c(SourceFile:74) [15w42a.jar:?]
at aym.b(SourceFile:57) [15w42a.jar:?]
at bfi.e(SourceFile:35) [15w42a.jar:?]
at bfi.<init>(SourceFile:28) [15w42a.jar:?]
at bfg.b(SourceFile:43) [15w42a.jar:?]
at bcw.a(SourceFile:367) [15w42a.jar:?]
at bag.a(SourceFile:863) [15w42a.jar:?]
at bdd.a(SourceFile:214) [15w42a.jar:?]
at bcw.a(SourceFile:341) [15w42a.jar:?]
at bdd.a(SourceFile:471) [15w42a.jar:?]
at bcw.k(SourceFile:404) [15w42a.jar:?]
at bcw.p(SourceFile:381) [15w42a.jar:?]
at bag.s(SourceFile:1546) [15w42a.jar:?]
at bag.as(SourceFile:931) [15w42a.jar:?]
at bag.a(SourceFile:379) [15w42a.jar:?]
at net.minecraft.client.main.Main.main(SourceFile:125) [15w42a.jar:?]
[06:37:34] [Server thread/INFO]: Starting integrated minecraft server version 15w42a
[06:37:34] [Server thread/INFO]: Generating keypair
[06:37:35] [Server thread/INFO]: Preparing start region for level 0
[06:37:36] [Server thread/INFO]: Preparing spawn area: 21%
[06:37:36] [Server thread/WARN]: Keeping entity Pig that already exists with UUID b701fd88-11c4-4a54-bbcd-2951ab40e459
[06:37:36] [Server thread/WARN]: Keeping entity Villager that already exists with UUID 5eb752d9-5199-42f2-b43a-b9403628d068
[06:37:36] [Server thread/WARN]: Keeping entity Villager that already exists with UUID 130d4aec-0220-4147-9ed5-c932cabb8552
[06:37:36] [Server thread/WARN]: Keeping entity Villager that already exists with UUID 8c35a75e-bb51-44ce-a88a-5de5f8f353f1
[06:37:37] [Server thread/WARN]: Keeping entity Pig that already exists with UUID 5278f1ff-2b20-4ecb-b8a2-8109419abff6
[06:37:37] [Server thread/INFO]: Preparing spawn area: 89%
[06:37:37] [Server thread/INFO]: Changing view distance to 12, from 10
[06:37:37] [Server thread/INFO]: toddh39[local:E:02f9e0c8] logged in with entity id 349 at (179.1168888821925, 64.0, 256.4600922831035)
[06:37:37] [Server thread/INFO]: toddh39 joined the game
[06:37:38] [Server thread/WARN]: Keeping entity Sheep that already exists with UUID fbc21f3c-28bb-454a-988a-d627975054b4
[06:37:38] [Server thread/WARN]: Keeping entity Pig that already exists with UUID 1dacb6f1-e170-4bc7-8360-4fbfb1efbd33
[06:37:38] [Server thread/WARN]: Keeping entity Chicken that already exists with UUID 93bef3ac-54ef-477e-a7a8-f293230ff947
[06:37:40] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2747ms behind, skipping 54 tick(s)
[06:37:42] [Server thread/INFO]: Saving and pausing game...
[06:37:42] [Server thread/INFO]: Saving chunks for level 'Earth 3'/Overworld
#

1. A fatal error has been detected by the Java Runtime Environment:
   #
2. EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0xffffffffa3325120, pid=560, tid=9992
   #
3. JRE version: Java(TM) SE Runtime Environment (8.0_25-b18) (build 1.8.0_25-b18)
4. Java VM: Java HotSpot(TM) 64-Bit Server VM (25.25-b02 mixed mode windows-amd64 compressed oops)
5. Problematic frame:
6. C 0xffffffffa3325120
   #
7. Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
   #
8. An error report file with more information is saved as:
9. C:\Users\toddh39\AppData\Roaming\.minecraft\hs_err_pid560.log
   Compiled method (c1) 31632 6077 3 aqm$a: (9 bytes)
   total in heap [0x0000000003242110,0x0000000003242540] = 1072
   relocation [0x0000000003242230,0x0000000003242270] = 64
   main code [0x0000000003242280,0x0000000003242400] = 384
   stub code [0x0000000003242400,0x00000000032424a8] = 168
   oops [0x00000000032424a8,0x00000000032424b0] = 8
   metadata [0x00000000032424b0,0x00000000032424b8] = 8
   scopes data [0x00000000032424b8,0x00000000032424d8] = 32
   scopes pcs [0x00000000032424d8,0x0000000003242528] = 80
   dependencies [0x0000000003242528,0x0000000003242530] = 8
   nul chk table [0x0000000003242530,0x0000000003242540] = 16
   #
10. If you would like to submit a bug report, please visit:
11. http://bugreport.sun.com/bugreport/crash.jsp
    #
    AL lib: (EE) alc_cleanup: 1 device not closed

Steps to Reproduce:
1. Press the Play button on launcher
2. ...
3. ...