I accidentally switched to guest account

[AC Question]

I switched to the guest account on accident, didn't even know it was there, now my screen savers ate different, and I can't get them to go back even after figuring out how to go back to the owner account. How to I get rid of the guest account and how to I make my stuff go back the way it was? I've restarted the tablet but my lock screen isn't working and now has the background or wallpaper that it got when the guest account got turned on. Seriously want throw this thing against the wall now.