my own experience is whenever the user of Malwarebytes, who is also using other anti-virus software, faces freezing problem on logon screen or operating system hanging, retarts the windows and goes to safe mode. When you are in the safe mode logon screen, please wait for at least 30 seconds before logging in. Then, you can restart and boot the windows in normal mode after successfully loading the windows in safe mode. Remenber: Do not keep restarting the windows in normal mode for more than two times if your computer encounters any frozen symptoms in using Malwarebytes. Another frozen symptom of latest Malwarebytes is after its database updating, hope I am not wrong with this one.