I have found similar topics, but none of the answers helped me.
I have installed Elementary, but the amount of bugs on it was atrocious, so I wanted to move back to just regular Ubuntu (Yeah, I know they have the same kernel and what not- but on Elementary things like the clock, wifi aren't working and they were working perfectly before). I managed to get my log on screen back to Ubuntu and delete all the apps, but I still have the KUBUNTU screen when turning on the laptop and have the Elementary in the settings as my system.