League is not working for me.

I open the league client and click launch but then the game disappears and does not open the login screen. I checked my control panel and the league client is still running in the background but the game does not open. I tried running it in administrator, but that did not do anything. I don't know why it is not working when I was just playing it yesterday.

update- nvm I had to reset my whole computer, but it is working now. Some kinda program got on my pc and were screwing with it.