I can't log lol

After window 10 update, when I tried to log in lol It said unexpected error so I uninstall the window10 update but didn't work. So I went to support lol and tried to fix it but also didn't work. I also format my computer but it didn't work!!!! only lol doesn't work. PUBG works well. I love lol I want to play right now please fix the problem.