My minecraft keeps crashing when I try to open it. (there are like 20 posts that say the same thing, but all of them are marked as not enough information)

When I open my Minecraft, the launcher works and everything, however when the game itself loads it suddenly crashes, mostly on the Mojang Loading Screen or after I click "Multiplayer".
My game output log says this:

17:47:03 launcher Preparing to launch minecraft client for 1.8.9
17:47:03 launcher Checking installations.
17:47:03 launcher Minecraft client 1.8.9 is ready to start.
17:47:03 launcher Starting!
17:47:04 launcher Using default game log configuration client-1.7.xml (outputs XML)
17:47:06 ave Setting user: *******
17:47:06 ave (Session ID is token:60417ade65004258a65e6b3bbaafd591:922a1fa2447c409aa4de9f663359f38f)
17:47:08 ave LWJGL Version: 2.9.4
17:47:09 bnn Reloading ResourceManager: Default
17:47:09 bpx Starting up SoundSystem...
17:47:10 bpx Initializing LWJGL OpenAL
17:47:10 bpx (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
17:47:11 bpx OpenAL initialized.
17:47:11 bpx Sound engine started
17:47:12 launcher
12:47:12 monitor Process crashed with exit code 77
AND
Error executing task
java.util.concurrent.ExecutionException: java.lang.NullPointerException
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:192)
at g.a(SourceFile:45)
at ave.av(SourceFile:881)
at ave.a(SourceFile:325)
at net.minecraft.client.main.Main.main(SourceFile:124)
Caused by: java.lang.NullPointerException
at auo.d(SourceFile:229)
at bcy.a(SourceFile:1392)
at hr.a(SourceFile:113)
at hr.a(SourceFile:13)
at fh$1.run(SourceFile:13)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at g.a(SourceFile:44)
... 3 more
19:06:38 ave Error executing task
java.util.concurrent.ExecutionException: java.lang.NullPointerException
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:192)
at g.a(SourceFile:45)
at ave.av(SourceFile:881)
at ave.a(SourceFile:325)
at net.minecraft.client.main.Main.main(SourceFile:124)
Caused by: java.lang.NullPointerException
at auo.d(SourceFile:229)
at bcy.a(SourceFile:1392)
at hr.a(SourceFile:113)
at hr.a(SourceFile:13)
at fh$1.run(SourceFile:13)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at g.a(SourceFile:44)
... 3 more

I've tried googling what exit code 77 is, but I haven't had any luck. I've tried boosting the RAM that I dedicate to Minecraft and restarting my computer, but that hasn't worked. Someone suggested that I uninstall/re-install my java file, but when I go to Control Panel --> uninstall apps no java apps show up. I'm hoping that I don't have to uninstall/reinstall Minecraft. It would be great if anyone could help me. Thanks~ (I've tried getting the crash logs but the link provided in previous forum links doesn't help; I still can't find the crash logs I can find "logs" but not the part where my game crashes. It would mean a lot to me if someone helped.