How to fix Minecraft Launcher problem
Here’s other way to fix problems with Minecraft launcher. Do all the steps listed below and it should help. If it does not help you should contact the Minecraft Support for future instructions.
1. Delete all Minecraft game files
Go to Start, in Search box type “%appdata%” and DELETE whole “.minecraft” folder.
2. Download game launcher again
Go to this page and download a game again.
3. Repair game using launcher
When you have download a Minecraft installer, open it and click on “Repair” to install a game.
4. Start game
When installation is done, open Minecraft through its desktop icon and let it update.