Client won't open

Hello, I am having some client issues. I am unable to open my client to log-in and am not sure what is wrong. I also disabled my Norton security and that worked for a little but now the client does not open at all. I run the app in compatibility mode and as administrator but still nothing, the LoL emblem just stays and the client does not open to the login screen. I have also tried reinstalling the game but still nothing. This has been happening for a while and usually I can find ways around it but I cannot anymore. Actually as I was typing this I reopened the client for the fifth time, after reinstalling the client, taking off my Norton, and restarting my computer and for some reason the client opened and I am not sure why. Any advice would be helpful because this has happened before but if I close the app and try to open it again it will not open. Thank you.
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