Unexcpected error has occurred

I keep getting the unexpected error message when I try to patch 5.23. I went through all of the trouble shooting and nothing has worked yet. I then uninstalled and then reinstalled the client and still error. Repairing does not work either and all I want to do is play league on my fall break. This has never happened before to me either so I just really really want a fix for this already as I have been trying to fix it all day.