WTF League, why don't you open?

So, I just found out that my dad restored my computer, and when i tried to get on to league, here is what happened: It opens up as normal, but when i hit the launch button, it closes (as normal) but it just shuts off, and won't go to the login screen? So i started to deleted a few extra programs i had to free space, but it didn't work. So I had to uninstall and reinstall league, and you know what happened? Nothing! So why is it not going through to the next screen?? Is this a problem for others, or just me, and how can i fix it?