Launcher doesnt open.

Hello. I'm writing here to report some weird bug with my launcher. Some time ago i download Minecraft launcher for the first time. Back then i was playing demo version. I do some break from that game but i wanted to buy full version of the game. When i try to install launcher again this information pop out. I do anything i could but is still closing and showing me that messages. Could you please help me with this? This didnt happen before and i dont know what to do with this. Greetings Julka W. (One of the messages that pop out are in my native language but it means this: "The minecraft game cannot start. This is most likely caused by damage. Try reinstalling minecraft." (Wich i do already)).