I open my launcher.It opens in the taskbar . I press on it and a flash image appears in the bottom left corner and dissappears. Everytime I open it this happens. Please help!!
Natvelog:

Set run directory to C:\Program Files (x86)\Minecraft
Native Launcher Version: 1321
Operating System: Windows 10 Home
Application Hash: d026a01a83aeaec4111e8c7430ad89b21f3a30f3
Application Data directory: C:\Users\Andrei\AppData\Roaming/.minecraft
Executable Path: MinecraftLauncher.exe
App Directory dir: C:\Program Files (x86)\Minecraft
Start dir: C:/Users/Andrei/AppData/Roaming/.minecraft
Launcher dir: C:/Program Files (x86)/Minecraft/game
TmpDir dir: C:/Program Files (x86)/Minecraft/tmp
(Optional) Java Launcher hash:
Java Version: 1.8.0_25
x64: 1
Auto configured proxy is used
LauncherConfiguration from: http://launchermeta.mojang.com/mc/launcher.json
Downloaded config
Native launcher is current
Native launcher is current
Detected previous run with new launcher, format of C:/Users/Andrei/AppData/Roaming/.minecraft/launcher_profiles.json is 2
Using new launcher as self upgrade has been detected.
Launcher library is up to date with hash ec064f05257ba720c432bce019329ec56417a61f
Check to see if we can run the launcher
Native launcher is current
Starting launcher.dll with C:\Program Files (x86)\Minecraft\runtime\jre-x64\1.8.0_25\bin\javaw.exe
Found SetDllDirectoryW in kernel32.dll!
Added C:\Program Files (x86)\Minecraft\game to DLL search path
Running launcher!
Launcher ended with 0

Launcherlog
[0817/141231:INFO:LauncherAppBrowser.cpp(24)] Work dir is C:\Users\Andrei\AppData\Roaming\.minecraft

[0817/141231:INFO:ClientHandler.cpp(182)] Creating launcher window.

[0817/141231:INFO:LauncherAppRenderer.cpp(110)] Javascript bridge extended.

[0817/141234:INFO:ClientHandler.cpp(846)] Preferences / startup: Read preferences

[0817/141234:INFO:ClientHandler.cpp(846)] Preferences: Wrote preferences

[0817/141234:INFO:ClientHandler.cpp(846)] Configurations: Loading profiles

[0817/141234:INFO:ClientHandler.cpp(846)] Configurations: Loading settings

[0817/141234:INFO:LocalVersionProvider.cpp(81)] Looking for installed versions in C:/Users\Andrei\AppData\Roaming\.minecraft\versions

[0817/141234:INFO:ClientHandler.cpp(846)] Session: Read authDB

[0817/141234:INFO:ClientHandler.cpp(846)] Updating server status

[0817/141234:INFO:GameController.cpp(216)] Reinstancing game callbacks...

[0817/141235:INFO:ClientHandler.cpp(846)] GameStarter: Previous instance(s) found

[0817/141236:INFO:ClientHandler.cpp(846)] Preferences: Wrote preferences

[0817/141252:INFO:ClientHandler.cpp(149)] Shutting down!