Launcher stops installing game at 80%

So, this morning I was trying to installing LoL on my SVE14115FLP, Windows 7 64 bits when i noticed the install had stoped at 2/2 80% and I had internet connection, later, after 30 minutes, I realised the process never did stop -It was really late because I restarded the launcher 3 times and it had to install the whole game again- but It still was working right now the game is ready to play. I'm sorry i didn't got a proper screeshot thought i did but I didn't save it properly and now the file is corrupted.

This post isn't really that usefull... but i hope if someone looks for help they will see this and realise it still works, also I expect RIOT to be fixe this, if it was'nt my fault