Update failed?! Why?!

So basically, when I try to get on League, before i'm even able to launch it, it attempts to update, then it says. Update failed. Unspecified error occurred. Please check the logs for more information. I attempted to use the Hextech Repair Tool, and I didn't find anything in the logs, and I attempted to have League search my folders, and that didn't work, so i'm kinda stuck.