Linux Mint 19.1 Tessa won't start

Hey everyone, I installed Linux Mint 19.1 Tessa a while back, honestly I don't know almost anything on how to work Linux, but I was tired of Windows' automatic updates so switched to Linux. I have had this OS for a while now and had no problems, but now all of a sudden my computer won't start. It starts off normally with the loading screen, but then it gets all black with just the '_' blinking in the corner. When i shut it off it displays an error message "wlp3so: failed to remove key (1, ff:ff:ff:ff: ff:ff) from hardware (-22)" I don't know what to do and would appreciate any help you got. (English is not my first language so I apologise for any mistakes i may have made).