Updated to G900VVRU2DPF4... used it for like a day, now having a big problem. Help?

So I updated to G900VVRU2DPF4 and my phone was working fine until when I rebooted one of these times. Now I am getting 'Unfortunatly Sytem UI has stopped.' so I hit ok then the sreen goes blank with my homescreen wallpaper (and starts blinking from black to the wallpaper Except when I hit the lock button then It locks) and I can't do a thing. I recently turned off ADB on the phone so I can't do nothing there and I tried clear cache that did not work. I read that I need to erase the data on the system ui under setting, apps... but I can't even get into setting. I DO NOT WANT TO FACTORY RESET THE PHONE and erase all my files. There must be a way to fix it. I tried remote controlling via wifi (like with google's device manger and Samsung findmyphone) but now the phone won't connect to wifi for some reason it won't turn on. I am trying to sideload Samsung Good Lock because that might fix it also but I can't. I need help big time. When I connect it the the computer it kinda read it but I can't get files off the phone but it shows up and Unassuming Kies/Smart Switch does not work either. There must be a fix without loosing data. Help Please? :'-(


P.S. I tried adb sideload the PF4 updated in recovery and that did not fix it.

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